Which of these events occurred first? A. 55 BCE – Julius Caesar attacked Great Britain.
B. 509 BCE – Rome became a republic.
C. 776 BCE – The first Olympic Games were held in Greece.
D. 214 BCE – Work began on the Great Wall of China.

the right answer for the question that is being asked and shown above is that: "their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.  " the  participant in european imperialism is being described below is that  their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful. 

answer; /// i believe the correct answer is (oasis)

a causal relation between two events exists if the occurrence of the first causes the other. the first event is called the cause and the second event is called the effect. a correlation between two variables does not imply causation.

explanation: