You can start by asking a question for the opening statement about theories (that doesn't include I, you, us, we, etc. unless the teacher says so), or maybe state a well-known theory that was proven false, then go off of that.
Answer:
B. He can marry her
Explanation:
I hope this helps you
:)
Its a. Sometimes, we have to rethink a situation in light of nee knowledge
I think whom. Since it sounds better then who in that sentence.
