TASK DEFINITION: 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.
PROBLEM: A car tire runs over a can and crushes it completely. Which statement is true for the atoms of the structure of the can?  
 (A) The atoms are broken. (B) The atoms are flattened. (C) The atoms remain the same. (D) The atoms are changed into different atoms.

SOLUTION: C

PROBLEM: If an atom of hydrogen gives up one electron, what is its overall charge?  
 (A) -1 (B) +1 (C) -2 (D) +2

SOLUTION: B

PROBLEM: The human brain has an absolute requirement for glucose. Glucose is an absolute requirement because the brain cannot use any other sources of energy. Other organisms often have absolute requirements for specific energy sources. Which protist would you expect to have an absolute requirement for sunlight?  
 (A) volvox (B) amoeba (C) euglena (D) paramecium

SOLUTION:
A