Identify which one of the following sentences contains an unnecessary comma. Please correct the error and explain why the correction is necessary.

Question

a. I must have been completely absorbed in my work, because I totally forgot about the meeting.
b. Because I became completely absorbed in my work, I totally forgot about the meeting

Answer 1

I'll be glad to check your answer.

Answer 2

would the correct answer be (B)Because I became completely absorbed in my work, I totally forgot about the meeting

Answer 3

Right.