Fill in the blank with the most appropriate option.
If I ___________ to pick a single factor to answer this big question.

Correct option is B

The correct option to fill in the blank is (b) were.
Explanation: This is a subjunctive conditional sentence. When expressing a hypothetical or imaginary condition, we use “were” with “I”, “he”, “she”, or “it”.
Example: If I were a bird, I would fly.
Why other options are incorrect:
· (a) have: Incorrect tense.
· (c) am: Avoided in hypothetical conditionals.
· (d) was: Grammatically wrong in subjunctive mood.
�� Information Booster: In hypothetical/unreal conditions, use “were” for all subjects (even with “I”).