Definition: You are given a science question (easy-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.
Input: Which rankings of trees would most likely useful in a scientific study of fruit production in apple trees?
(A) date of flowering and the fruit yield (B) fruit yield and taste of the fruit (C) taste of the fruit and smell of the flower (D) date of flowering and smell of the flower
Output:
A