Which Statement Best Indicates That the Client Understands the Differences

Which statement best indicates that the client understands the differences in the follicular and luteal phases of the ovarian cycle?

A) "My period will be every 28 days."
B) "The follicular phase is when the egg is fertilized."
C) "The follicular phase is the second half of my cycle."
D) "The first part of my period might vary in length, but not the second."