You are given a science question (hard-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.

Ex Input:
Two flowers are both roses. One rose is larger and has more fragrance than the other rose. What advantage will one of the roses most likely gain because of this difference?  
 (A) The larger rose will have fewer petals than the smaller rose. (B) The larger rose will more easily attract bees than the smaller rose. (C) The smaller rose will have more pollen than the larger rose. (D) The smaller rose will grow faster than the larger rose.

Ex Output:
B


Ex Input:
Forests have been cut and burned so that the land can be used to raise crops. Which consequence does this activity have on the atmosphere of Earth?  
 (A) It reduces the amount of carbon dioxide production. (B) It reduces the production of oxygen. (C) It decreases the greenhouse effect. (D) It decreases pollutants in the air.

Ex Output:
B


Ex Input:
Adaptive characteristics that help dolphins survive life in the ocean include all of these except  
 (A) their sleek skin. (B) swimming very fast. (C) their body shape. (D) traveling alone.

Ex Output:

D