He read his textbooks carefully and made concept maps to help him remember the details. The dates were giving him trouble, though, so he tried to memorize them by reading them aloud and then saying them without looking in the book. He also made a time line and flashcards to help him remember important facts.
Answer:
People from different tribes do not marry one
another
I think it a or b but think more a sorry if I am wrong
Doused-to plunge into water; drench