Lyell's Book Principles of Geology, Which Darwin Read on Board

Multiple Choice

Lyell's book Principles of Geology, which Darwin read on board the HMS Beagle, argued in favor of which of the following concepts?

A) Earth's surface is shaped mainly by occasional catastrophic events.
B) Meteorite impacts may have been a major cause of periodic mass extinctions.
C) Earth's surface is shaped by natural forces that act gradually and are still acting.
D) The processes that shape Earth today are very different from those that were at work in the past.