When using a counterexample to prove a conditional statement false, which must be true about the counterexample? there must be infinite counterexamples the counterexample must satisfy the hypothesis of the conditional statement. there must be at least one example under which the conditional statement is true. the counterexample must satisfy the conclusion of the conditional statement.

the answer is B. just saying, im pretty sure.

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.