"The Present Is the Key to the Past" Is the Uniformitarian

Multiple Choice

"The present is the key to the past" is the uniformitarian concept that ________.

A) geologic processes give rise to the same types of products and features
B) rivers, seas, mountains, etc.are perpetual features of an unchanging landscape
C) each mountain that is eroding today to produce river sediment has always done so
D) the rates of geologic processes (erosion, sedimentation, volcanism) are invariant