Question

Why was the theory of plate tectonics met with challenges from other scientists when it was first proposed?
a. there was no evidence to support it
b. the scientist who proposed it was obviously biased
c. there was no explanation yet for how it could be happening

Answer 1

A is the correct answer. ...

Answer 2

The answer is C.

There was no explanation yet for how it could be happening.

"There was plenty of evidence that the plates were moving, but scientists at first had no explanation for the cause."