单选题 Man: Look at this baby patting device. It helps the baby fall asleep by patting it.
Woman: ______.
Man: How?
Woman: If the baby moved around and the patter patted it on the head, it could injure the baby.
A. The possible disadvantage is that it could actually harm the baby.
B. There's a baby doll in it.
C. Most of the patting device is made of steel.
D. I think the device is big enough for the baby.