Answer:
B) What makes you say that? Is it because you saw it happen, or?
Explanation:
When someone transcribes a speaker's words using the Clean Verbatim Style Guide, they omit the crutch words and other fillers and correct the non-formal truncations to formal, correct versions of these words.
Crutch words are fillers that help us think about our response by giving us some extra time. The crutch word used in the given sentence is like. It needs to be omitted.
Truncations are shortened versions of words. They are usually used in an informal context. The truncation used here is 'cause. It should be corrected to because.
This is why option B is the correct one.