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.

[EX Q]: A rubber band will make a sound when it is  
 (A) vibrated. (B) stretched. (C) cut into pieces. (D) shot across a room.
[EX A]: A

[EX Q]: Which of these is a renewable resource found in Nevada?  
 (A) zinc metal (B) gravel deposits (C) petroleum products (D) geothermal energy
[EX A]: D

[EX Q]: Which statement describes the most likely effect of transformation on bacteria such as E. coli?  
 (A) Transformed bacteria express a new protein product. (B) Transformed bacteria have multiple chromosomes. (C) Transformed bacteria reproduce more quickly. (D) Transformed bacteria become a new species.
[EX A]:
A