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 Input:
Which series correctly represents the levels of organization in an organism?  
 (A) cells -> organs -> organ system -> tissue (B) cells -> tissue -> organs -> organ system (C) tissue -> cells -> organ system -> organs (D) tissue -> organ system -> cells -> organs

Ex Output:
B


Ex Input:
Which characteristic of frogs is an adaptation to living in water?  
 (A) strong legs (B) webbed feet (C) dull colors (D) moist skin

Ex Output:
B


Ex Input:
Which statement best describes the energy transformations that occur when a candle burns?  
 (A) Heat energy from the wax is converted into chemical and light energy. (B) Heat energy from the air is converted into mechanical and light energy. (C) Chemical energy from the wax is converted into light and heat energy. (D) Chemical energy from the air is converted into mechanical and light energy.

Ex Output:

C