Following surgical removal of one ovary, the specimen was sent for pathologic examination. As the pathologist reviewing this slide for microscopic evaluation, you find with the ovarian cortex an oocyte surrounded by granulosa cells. Immediately this would indicate to you that this is:
a. a normal primary ovarian follicle
b. an abnormal corpus luteum
c. an abnormal secondary follicle fertilized ovum
d. a normal secondary ovarian follicle