hey could someone help me with this. i’ll be marking brainiest to the correct answer. (pls don’t guess or leave a link. pls answer if u know)

Adaptive radiations can be a direct consequence of four of the following five factors. selectthe exception. a) vacant ecological niches b) genetic drift c) colonization of an isolated region that contains suitable habitat and few competitor species d) evolutionary innovation e) an adaptive radiation in a group of organisms (such as plants) that another group uses as food