问题详情

Scientist 1’s viewpoint would be weakenedby which of the following observations about comets, if true？
A.Comets are composed mainly of frozen materials.
B.Comets are much larger than 100m in diameter.
C.Comets often pass close enough to Earth to inter-sect Earth’s atmosphere.
D.Comets orbit the Sun.请帮忙给出正确答案和分析，谢谢！