Can someone help me with this?

Why were the chang and xi rivers important to china’s development? a. they keep invaders out. c. they kept china isolated. b. they provided a route for ships to travel inland. d. they provided boundaries for the different political sections

In what middle eastern country did a terrorist attack on americans take place in the city of manbij?

When was thomas jefferson defeated in the presidential election a. before be wrote the declaration of independence b. before he was minister to francec. after he was minister to franced. 1792