Which river system the world’s earliest known civilization develop?
a: indus
b: nile
c: tigris-euphrates
d: yellow

What is the potential danger from an accident at a nuclear power plant? a) fire and large scale explosions b) exposure to radiation c) meltdown of the plant and surrounding community d) entire cities could be wiped out

Marie comes from a home in florida in which french is the only language spoken. what type of diversity is this?

Which is the correct definition of an economy ?