Question

the end - triassic mass extinction happened approximately 201 million years ago, when about 80 percent of species (including many species of bivalves) died off. researchers have proposed the effects of a sudden release of carbon dioxide as one mechanism that may have brought on this mass extinction. but mass extinctions, while abrupt in geological terms, unfold over thousands or millions of years: its likely that multiple factors drove widespread species loss. based on the text, the author would most likely agree with which statement about the end - triassic mass extinction? a) it likely involved the extinction of more species than is typically believed. b) it is hard to detect in earths fossil or geological records. c) it occurred over a long period of time and probably had multiple causes. d) it was discovered only recently and is poorly understood.

Explanation:

The text states that mass extinctions, including the End - Triassic one, unfold over thousands or millions of years and that multiple factors likely drove species loss.

Answer:

C. It occurred over a long period of time and probably had multiple causes.