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.

Which energy transfer occurs when a student blows a whistle?  
 (A) electrical to sound (B) light to electrical (C) heat to mechanical (D) mechanical to sound
D
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.

Which energy transfer occurs when a student blows a whistle?  
 (A) electrical to sound (B) light to electrical (C) heat to mechanical (D) mechanical to sound
user
D
assistant
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.

Which energy transfer occurs when a student blows a whistle?  
 (A) electrical to sound (B) light to electrical (C) heat to mechanical (D) mechanical to sound
D