Question

Which would best explain the decline of an early civilization?

A.
A river and its tributaries change course over time.

B.
People settle near a river where it empties into the sea.

C.
The natural features in an area include high mountains, large deserts, and oceans.

D.
A large river floods annually.

Answer 1

d and b

Answer 2

@ryamorgan284 It's only one.
It would say 'choose all answers that are correct' if it was more than one.

Answer 3

d