Animals being in captivity is bad for their instincts. In captivity, animals lose their more wild side that's in touch with their original and natural environment. Unless an animal (specifically whales in this case) is injured and cannot be in the wild, they should not be kept in captivity.
The principal structural characters effected were in the postcranial anatomy, especially in the skeletal and muscular systems.
The answer you are looking for here is C.
