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.

Input: Consider Input: What is one condition necessary to produce diamonds?  
 (A) high altitude (B) intense pressure (C) quick cooling (D) low temperatures

Output: B


Input: Consider Input: As the molecules of water begin to slow down they go into a phase where they are no longer able to easily move past each other. The water is passing through a phase change and will     
 (A) remain a mixture. (B) remain a compound. (C) become an element. (D) become a compound.

Output: B


Input: Consider Input: Tori made some observations about a grasshopper she saw on a nature walk. Which statement about the grasshopper is a scientific observation?  
 (A) The grasshopper is pretty. (B) The grasshopper is dangerous. (C) The grasshopper is better than a spider. (D) The grasshopper is smaller than the leaf.


Output: D