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: safety goggles are used for protecting the eyes during experiments, Fact2: Firm plastic eyeglasses or goggles are better., Question: What protects the eyes during experiments? (A) magnesium (B) Chemicals (C) Vibrissae (D) Type O (E) Rolex (F) plastic (G) water (H) wind
F

Fact1: a mutation in the sex cells of a parent can cause a new trait to appear in the parent 's offspring, Fact2: Animals that reproduce sexually produce sex cells, or gametes., Question: a mutation in the _ of a parent can cause a new trait to appear in the parent 's offspring (A) eggs (B) courtship (C) mitochondria (D) alleles (E) pollen (F) gametes (G) ATP (H) hormones
F

Fact1: Most invertebrates have a nervous system., Fact2: Insects are the most common invertebrates., Question: what do most types of have nervous systems? (A) complex (B) animals (C) cows (D) insects (E) goats (F) protist (G) bacteria (H) sweat glands
D