Why did the marriage of ferdinand and isabella unify spain? a. there were no kings or queens in spain until their marriage. b. they came from humble backgrounds, so everyone could relate to them. c. they led the reconquest of spain from centuries of christian rule. d. they were from different geographic and cultural parts of spain.

The marriage of Ferdinad and Isabella helped unify Spain because they were from different geographic and cultural parts of spain. Therefore, D would be the correct answer choice.

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."