When Darwin Covered the Tip of a Grass Seedling with Metal

Multiple Choice

When Darwin covered the tip of a grass seedling with metal foil and then illuminated it from one side,what happened to the seedling?

A) It bent away from the directional light.
B) It did not respond to the directional light.
C) It grew toward the light,as expected.
D) It waved back and forth.
E) It wilted and died.