Please help me with this!!

image above

I think the answer is --->   C. Associative Property of Addition

Sorry if i am wrong.

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."

c. the passage of the fifteenth amendment