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: fossils are formed when layers of sediment cover the remains of organisms over time, Fact2: Plants and animals are organisms., Question: What forms when plants are covered in layers of sediment over time? (A) Conifers (B) watershred (C) fossils (D) H2O (E) Echinoids (F) bubbles (G) loose soil (H) bones
[EX A]: C

[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: Many plants respond to the days growing shorter in the fall by going dormant., Fact2: Autumn or Fall is already here., Question: How do many plants respond to days getting shorter in autumn? (A) Change colors (B) spread seed (C) Exfoliation (D) bioaerosols (E) grow a layer of fur (F) go dormant (G) adding heat (H) enlarge themselves
[EX A]:
F