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.

A meteoroid becomes a meteorite when it  
 (A) impacts the surface of a planet. (B) encounters the atmosphere of a planet. (C) makes a complete orbit around a planet. (D) starts to burn up in the atmosphere of a planet.
A

Which of these senses lets Dora know when a skunk has been close to her house?  
 (A) Taste (B) Touch (C) Smell (D) Hearing
C

The Sun transforms matter into energy through nuclear fusion. What can be inferred about the Sun from this fact?  
 (A) The Sun is losing mass and hydrogen. (B) The Sun is losing volume and hydrogen. (C) The Sun is losing mass and helium. (D) The Sun is losing volume and helium.

A