Answer:
The answer is b. Must occur within 12 months of the approval date.
Step-by-step explanation:
Continuing review of an approved and ongoing study posing more than minimal risk that was initially approved by a convened IRB, must occur within 12 months of the approval date, even in situations where no extra risks exist; however, if any problems are sensed but not expected, they should be considered during the process of continuing review.