In Blind Cave Fish,eyes Do Not Form

Multiple Choice

In blind cave fish,eyes do not form.However,transplantation of the lens from a closely-related aboveground fish into the optic cup of the cave fish induces eye development.What does this suggest about the loss of vision in the cave fish?

A) Primary induction of the eye fails in the cave fish because the lens lacks some critical signal.
B) Secondary induction of the eye fails in the cave fish because the lens lacks some critical signal.
C) Primary induction of the eye fails in the cave fish because the optic cup lacks the ability to receive some critical signal.
D) Secondary induction of the eye fails in the cave fish because the optic cup lacks the ability to receive some critical signal.