The answer here is B, the author wants to emphasize that Dr.Reed feels that these ideas haven’t been proven yet.
Explanation:
The sentence before the 2 <em>might'</em>s<em> </em>has prove in italics and quotations. This shows the use of sarcasm or uncertainty, which the author continues to write about in the continuing sentences. They weren't certain how it happened, but it <em>might </em>have happened that way,