What Is the Best Evidence Currently Available That Tetrapod Limbs

What is the best evidence currently available that tetrapod limbs evolved from fish fins?

A) These structures are located in similar places on these animals.
B) Molecular genetic evidence reveals regulatory enzymes that are homologous in fish and tetrapods.
C) There are enough transitional species available to make the link obvious.
D) Fish and tetrapods have many similarities-including reproductive and feeding tactics-that support the link.
E) None of the above currently support the conclusion that tetrapods evolved from fish.

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