Why was columbus sent back to spain in chains after his third voyage to the americas?
a. he hadn’t found enough riches for spain.
b. he had planted the spanish flag in venezuela.
c. he had failed to make friends with the american indians.
d. he and his two brothers had ruled hispaniola harshly.

The correct answers are A and D. After his third voyage to the Americas, Columbus was sent back to Spain in chains because he hadn’t found enough riches for Spain, and he and his two brothers had ruled Hispaniola harshly.

Hispaniola was an island colonized by the Spaniards of which Admiral Christopher Columbus himself was governor. At this time his brother, Bartholomew Columbus, was in command of the island. The capital of the Island was Santo Domingo, a city that had been founded on the south coast of the island.

From the island of Margarita, he sailed north towards the island of Hispaniola and disembarked in Santo Domingo. There, a group of Spaniards, headed by Mayor Francisco Roldan, had rebelled against the authority of Bartholomew Columbus and had retreated inland. The rebels argued a disappointment with regard to the riches they had been promised to find in the New World, since the little gold found did not meet all the expectations launched by Christopher Columbus, and by the harsh conditions of Bartholomew Columbus. Roldan had obtained the support of some Indians by promising to exempt them from the payment of tribute in gold, which they collected from the rivers, and in 1498 he had also obtained the support of half of the Spaniards and of all the towns and fortresses of the island of Hispaniola less La Vega and La Isabela. Once in Santo Domingo, Christopher Columbus tried to negotiate with the rebels, yielding to allowing the Indians to be used as a personal service. In Columbus' negotiation with the rebels of August 1499, all those who had rebelled were amnestied, and they were allowed to return to Spain when they wished and to join with the Taino and were paid the salaries that they had not received in the last two years, even if they had not worked.

Complaints were also argued against the way the Columbus brothers handled administrative matters. On the other hand the island of Hispaniola, instead of contributing money to the royal coffers, only demanded expenses. All this came to the ears of the King and Queen of Spain, who sent the Investigative Judge Francisco de Bobadilla, who arrived in Santo Domingo on August 23, 1500.

The Judge sent by the kings proceeded to arrest Christopher Columbus, his brother Bartholomew Columbus and his other brother Diego Columbus and embarked them chained to Spain in October 1500. They arrived in Cadiz, Spain, on November 25, 1500.

In Spain, Columbus was released by Isabella I of Castile but had to renounce the rights granted in the New World. In 1501, Nicolas de Ovando was sent as governor of Hispaniola, to replace Francisco de Bobadilla

"a government in which power is divided between state and national levels". federalism is a system of government in which entities such and state and province, share power with the national government.