Which Statement About Mutations Is True

Which statement about mutations is true?

A) Most mutations are either deleterious or advantageous.
B) Mutations are random with respect to the adaptive needs of organisms.
C) The effects of a mutation are constant;whether a mutation is deleterious or beneficial cannot be influenced by environmental conditions.
D) Only rarely does an individual human carry a new mutation in his or her genome.
E) Mutations alone result in adaptation.