Etiolated Seedlings Are Produced by Germinating Seeds That Are Kept

Etiolated seedlings are produced by germinating seeds that are kept in total darkness.Plants that are kept in the dark will begin to synthesize chlorophyll after they are given a pulse of

A) blue light.
B) red light.
C) red light followed by a pulse of far-red light.
D) far-red light followed by a pulse of red light.
E) ultraviolet light.