When the Researchers Inhibited the Synthesis of Gibberellins in the Tobacco

When the researchers inhibited the synthesis of gibberellins in the tobacco plants,neither ethylene nor far-red light could trigger a shade avoidance response.Taken together with the data presented above,these data suggest that gibberellins

A) act in concert (work together) with ethylene to generate the shade avoidance response.
B) antagonize (act opposite to) the effects of ethylene on the shade avoidance response.
C) are not involved in the shade avoidance response.