In Response to Grazing by Insect Larvae, Some Plants Produce

In response to grazing by insect larvae, some plants produce substances known as precocenes, which destroy the part of the insect brain that secretes juvenile hormone. What effect would exposure to precocenes have on insect development?

A) The larval insect would molt into an adult prematurely.
B) The larval insect would not be able to produce ecdysone.
C) The larval insect would molt into larger and larger larval stages.
D) The larval insect would not be able to molt.
E) The time interval between successive molts would increase.