Question

Fossils found in layers of sediment give us clues to Earth's past. Based on the fossil record of this area, we can assume that this area was
A.once a desert
B.once underwater
C.much colder in the past
D.located ina different place on earth
I ALREADY KNOW THE ANSWER I'M JUST GIVING SOMBODY SOME FREE POINTS IF THEY ANSWER.THE ANSWER IS B. ONCE UNDERWATER 

Answer 1

it is b ...................

Answer 2

it is b no problem underwater