What is is called when group of organisms show rapid rate of diversification in their form for a period of time a)adaptive radiation b) extinction c)macroevolution d)speciation

B - Extinction.

Explanation:

The organisms are rapidly become diverse from each other, causing the extinction of the original organism.

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.