13. Look at the four letters (A, B, C, and D) that indicate where the following sentence could beadded to the passage in paragraph 6.This is the criterion emphasized by Darwin’s theory of evolution by natural selection.Where would the sentence best fit?Impacts by meteorites represent one mechanism that could cause global catastrophes and seriouslyinfluence the evolution of life all over the planet.
(A) According to some estimates, the majority ofall extinctions of species may be due to such impacts.
(B) Such a perspective fundamentallychanges our view of biological evolution.
(C) The standard criterion for the survival of a species isits success in competing with other species and adapting to slowly changing environments.
(D) Yetan equally important criterion is the ability of a species to survive random global ecologicalcatastrophes due to impacts.Choose the place where the sentence fits best.
(A) Option A
(B) Option B
(C) Option C
(D) Option D