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: melting is when solids are heated above their melting point, Fact2: Ice cubes melt in liquid water., Question: What, when heated, turns into liquid water? (A) gasoline (B) oil (C) a solute (D) fire (E) ice cubes (F) a prism (G) mussels (H) Energy.
E

Fact1: a light bulb is used for seeing in the dark, Fact2: Conventional light bulbs generate light by heating a filament., Question: What is helpful for seeing in the dark? (A) an electron microscope (B) an electron lens (C) microscope (D) closing the blinds (E) blackouts (F) closing your eyes (G) focusing a lens (H) heating a filament
H

Fact1: Most invertebrates have a nervous system., Fact2: Invertebrates are animals without a backbone., Question: Which type of system do most animals without backbones have? (A) sensory neurons (B) Veins and arteries. (C) Nervous system (D) Stereo system (E) Root system (F) to move people (G) Skeletal system (H) insects
C