Antecedent Streams Can Flow Through a Mountain Range Because _____

Multiple Choice

Antecedent streams can flow through a mountain range because _____. ​

A) extreme flow velocities allowed them to flow over the top of the mountains
B) bedrock solution gradually opens a tunnel through the mountains that collapses
C) headward erosion connects two streams on opposite sides of the mountains
D) the gap in the mountains existed before the stream flowed through it
E) the stream existed before the establishment of the mountains