D.
By the time my daughter was this age she really only got 2 bottle (actual bottles) a day. One in the morning when she first got up (which she still gets at 14 mos, the other just before bed(has been replaced with the sippy). The rest of the time she was offered a sippy cup of formula at meal times. I'd start offering the sippy now, it will make the transition easier and almost done by the time she's 1. At the age she is, she doesn't to get the bulk of her nutrition from formula. The rest of the day I'd offer juice (cut 50/50) or water.