A
The committee, along with its chairperson and several key advisors, were scheduled to present its findings to the board next month.
B
The committee, along with its chairperson and several key advisors, was scheduled to present its findings to the board next month.
C
The committee and its chairperson and several key advisors, were scheduled to present its findings to the board next month.
D
The committee, along with its chairperson and several key advisors, are scheduled to present its findings to the board next month.
✓ Correct Answer: Option B
The subject of the sentence is 'The committee,' which is singular. Phrases like 'along with' introduce parenthetical information and do not change the number of the subject. Therefore, the singular verb 'was' is required.