In Plants That Germinate in Response to a Brief Pulse

In plants that germinate in response to a brief pulse of light,

A) green light is most effective in triggering germination.
B) far-red light is most effective in triggering germination.
C) far-red light reverses the effect of prior exposure to red light.
D) initiation of photosynthesis is the mechanism for germination.
E) a rise in temperature also triggers germination.