A Woman Who Has Been Taking a COCP for 2

A woman who has been taking a COCP for 2 months tells the primary care NP that she has had several headaches,breakthrough bleeding,and nausea.The NP should counsel the woman:

A) to change to a progestin-only pill.
B) to stop taking the COCP immediately.
C) to use a backup form of contraception.
D) that these effects will likely decrease in another month.