Rock layers are correlated if they both contain the same
a. elements
c. fossils
b. shapes
d. type of rock select the best answer from the choices provided a b c d

Rock layers are correlated if they both contain the same fossils. The correct option among all the options that are given in the question is option "c". There is another answer that is very close to the answer that i have given and that is the type of rocks. Since fossils is the closest answer, so i have chosen that.

Answer after wwii, communist countries in eastern europe formed the warsaw pack, a military alliance, and comecon, an economic alliance;