The answer is A) Unexpected....
not to be rude or anything that question don't make sense at all. lol
I would say B. The body replenishes water and ions during perspiration so the muscles can rest and repair during the cool down period
Try to convince mother to switch for breastfeeding if at all possible
Breastfeeding is the best for infants....but the word "to switch" doesn't match.
If the infant has taken feeding bottles yet, it's time to change the very first days.
Hope I helped !