The declaration of independence was written to
a. assert the colonies' desire to follow parliament
b. explain why colonists were angry with the british rule
c. encourage freedom and equality for slaves and women
d. support the british king but not parliament

The correct answer here would be B.

The colonists were really fed up with the ridiculous rules and unfair taxes the British were instilling. The colonists threatened the British government by saying "if you don't stop with these unbelievable taxes, we will remove ourselves from your country with or without your consent."

The British did not listen so the colonists declared war. Some years later near the end of the war, the colonists were the clear winner. They wrote the Declaration of Independence to the British King, King Henry the VIII {not 100% sure on the name} and he signed it.

The colonists were officially free.