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.

Example Input: Scientists wonder how the Egyptian pyramids were built. They think that the huge blocks of stone may have been put into place by pushing them up a sloping pathway. The pathway is which type of simple machine?  
 (A) lever (B) pulley (C) inclined plane (D) wheel and axle
Example Output: C

Example Input: Which particle type can be identified as being from a specific element?  
 (A) electron (B) atom (C) neutron (D) proton
Example Output: B

Example Input: Scientists found large areas of fossilized wood in a desert in Arizona. The fossilized wood is evidence of the ancient environment. Based on the evidence, what was the ancient environment in this area?  
 (A) forest (B) desert (C) glacier (D) grasslands
Example Output:
A