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: Most salamanders use their sense of smell to find a mate., Fact2: Like frogs, salamanders are amphibians., Question: What uses its sense of smell to find a mate? (A) the Sun (B) peachleaf willow (C) rocks (D) fur seals (E) warm-blooded (F) trees (G) passenger pigeons (H) some amphibians
H

Fact1: knowledge of the stars can be used to navigate, Fact2: Of course, astronomers also study stars., Question: What can be used to navigate? (A) music (B) backbones (C) astrology (D) cilia (E) magic (F) sponges (G) astronomy (H) lamphreys
G

Fact1: a thermometer is used to measure temperature, Fact2: Fever is measured using a thermometer., Question: a fever can be measured with what device? (A) Antibiotics (B) mesenchymal (C) stethescope (D) thermometer (E) calculator (F) dialysis (G) seismograph (H) lamphreys

D