At one time, Chondrichthyes were thought to have split off from other vertebrates before the evolution of bone. Now we have concluded that the Chondrichthyes split off after the evolution of bone had started. This change demonstrates . A. as new evidence emerges, scientists revise their hypotheses B. scientists develop hypotheses and only accept data that confirm their hypotheses C. revisions of hypotheses take many years D. scientists accept the simplest hypotheses

Option-A

Explanation:

Chondricythes is a group of fish which can be characterized by its jawbones, presence of cartilage, and paired fins.

The natural events and phenomenon can be explained by a scientific method which begins with asking a question, background research and then predicting a statement which explains the natural event called a hypothesis.  A hypothesis must be supported by the evidence.

In the given question, the hypothesis explaining the evolution of the Chondricythes changed with time which shows that the hypothesis can be revised with the advancement in technology and the production of new evidence which could either favour or do not favour.

Thus, Option-A is correct.

answer; i believe the correct answer is (anemia);