Paleontologists Did Not Just Stumble Across Tiktaalik, They Formed a Hypothesis

Multiple Choice

Paleontologists did not just stumble across Tiktaalik, they formed a hypothesis about where they would find a transitional form between fish and tetrapods. What might have been the logical first step in deciding where to "look" for a transitional form between fish and tetrapods?

A) They considered regions of the world where fossilization is likely to occur.
B) They looked for sedimentary rocks that were formed in shallow waters 370-380 million years ago.
C) They looked for sedimentary rocks that were formed in deep waters 370-380 million years ago.
D) They looked for sedimentary rocks that also contained fossils of the first land plants.