Detailed Instructions: In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").
Q: Plants would be unable to stand if they lacked (A) multiple leaves supported on its torso (B) gel that form shapes (C) the ability to flower nightly (D) tiny structures inside the support
A:
D