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").

[EX Q]: Fact1: Differentiation is the process by which unspecialized cells become specialized., Fact2: T helper cells differentiate to Memory cells and effector cells., Question: memory cells and effector cells are what compared to T helper cells (A) dermal & vascular tissue (B) antibodies (C) fetal development (D) antigens (E) occurs over a wide range (F) prokaryotic cells (G) unicellular organisms (H) more specialized
[EX A]: H

[EX Q]: Fact1: killing microorganisms in food can be used to extend the shelf life of that food, Fact2: Cooking kills the microorganisms., Question: What can extend the shelf life of food? (A) cooking it (B) Enzymes (C) evaporation (D) rays or beams (E) running it under water (F) Proteins (G) seasoning it (H) putting it on a counter
[EX A]: A

[EX Q]: Fact1: Gametes then unite in fertilization and form a diploid zygote., Fact2: Sperm and eggs are cells known as gametes., Question: What is formed when a sperm and egg unite in fertilization? (A) a haploid (B) two sperms (C) rapid expansion (D) gastropod shells (E) Chemical energy (F) peachleaf willow (G) an infant human (H) a diploid zygote
[EX A]:
H