What is an IS auditor’s BEST course of action if informed by a business unit’s representatives that they are too busy to cooperate with a scheduled audit?

What is an IS auditor’s BEST course of action if informed by a business unit’s representatives that they are too busy to cooperate with a scheduled audit?
A . Reschedule the audit for a time more convenient to the business unit.
B . Notify the chief audit executive who can negotiate with the head of the business unit.
C . Begin the audit regardless and insist on cooperation from the business unit.
D . Notify the audit committee immediately and request they direct the audit begin on schedule.

Answer: B