510(k) Premarket Notification is submitted:

Agroup of engineering students from purdue university reported that its licking machine, modeled after a human tongue, took an average of 364 licks to get to the center of a tootsie pop. twenty of the group's volunteers assumed the licking challenge-unassisted by machinery-and averaged 252 licks each to the center.

The answer is B, because the calcium in the bone is decreasing if they are losing a percentage of it each month they are in space