In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Fact1: All chemical reactions require activation energy to get started., Fact2: Chemical changes are a result of chemical reactions., Question: What is required before a chemical change? (A) kinetic energy (B) energy usage (C) activation push (D) activation energy (E) activation switch (F) activation power (G) Burning fuel and air (H) Evaporation
D

Fact1: Some touch receptors sense differences in temperature or pain., Fact2: Touch receptors are a type of mechanoreceptor., Question: some mechanoreceptors sense what in temperature? (A) Energy (B) Energy. (C) hunger (D) pain (E) differences (F) kinetic energy (G) heat energy (H) similarities
E

Fact1: safety goggles are used for protecting the eyes during experiments, Fact2: Safety goggles are mandatory in the laboratory., Question: What is often mandatory in the lab? (A) healthy lunch (B) Exposure to oxygen and water (C) fertilization (D) Extensive bone growth (E) Pasteurization (F) protection for the eyes (G) antigens that cause allergy (H) blood filtering procedure

F