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: Streams may start with runoff or water seeping out of a spring., Fact2: Streams A stream is a sequence of characters., Question: a sequence of characters may start with runoff or what seeping out of a spring? (A) sodium (B) Joules (C) liquid (D) rivers (E) solutes (F) water (G) rain (H) SO2
F

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: biofuel is used to produce electricity by burning, Fact2: Ethanol, a form of alcohol, is already the most common biofuel., Question: a form of alcohol is used to produce electricity by what? (A) reducing heat (B) burning (C) spreading seeds (D) sharing pressure (E) deadly (F) drinking (G) consumers (H) Decibels

B