Greg and Gina Rush Off to Begin Their Week's Vacation

Greg and Gina rush off to begin their week's vacation. In all the excitement, they forget Gina's contraceptive pills. They should

A) have sex as usual because the pills are effective for a week after she stops taking them.
B) purchase and use minipills to tide them over the week.
C) use a different position for intercourse to reduce the likelihood of impregnation.
D) use an alternative method of contraception for the rest of her present cycle.