Iridium, a hard, whitish metal similar to platinum, is extremely rare on Earth. Extremely high concentrations of iridium on Earth result
from only two scenarios: massive volcanic eruptions that release iridium from deep within the Earth and meteorites that shower down on Earth from space. When scientists found concentrations of iridium 30 times higher than normal in rock stratum from 65 million years
ago, they concluded that a massive meteor or comet hit the Earth and caused the massive extinction of the dinosaurs.
Which of the following, if true, most strongly supports the scientist’s conclusion?
A. Volcanoes massive enough to generate high concentrations of iridium are very rare.
B. Massive volcanic eruptions occurred frequently 80 million years ago.
C. Most scientists support the hypothesis that a cosmic impact wiped out the dinosaurs.
D. The massive extinction that occurred 70 million years ago killed not only the dinosaurs but also 70 percent of all life on Earth.
E. A comet struck the earth some 120 million years ago, but no widespread extinction occurred.
답이 B입니다.
이유가
화산 폭발 많이 일어났다 - > 근데 공룡이 아직 살아있다 -> 그러니 화산 폭발은 원인이 아니다
이건데
80million 이후에 화산 폭발이 일어나지 않았다는 말이 없는데 왜 답인가요?
아무리 생각해도 이 문제는 답이 없는 것 같은데..
고수님들 도와주십시오..