According to the article, why was John Ho initially hesitant about offering fish pedicures in his own salons?
A.He doubted that customers would agree to fish pedicures to treat medical conditions.
B.He thought that state regulators would give him a lot of flak about the doctor fish.
C.He was concerned about being able to maintain plant and aquatic life in the warm water.
D.He doubted that the carp could survive in the warm water of a comfortable footbath.