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").

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

A: H
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Q: Fact1: Urine is the liquid waste product of the body that is excreted by the urinary system., Fact2: Mammals excrete urea in the watery form of urine ., Question: What is a waste product of the body that is excreted by the urinary system? (A) potash (B) food (C) CO 2 (D) sugar (E) urea (F) liquid (G) H 2 O (H) sulfur

A: E
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Q: Fact1: sedimentary rocks are formed by deposition, Fact2: Soils are sand, clay, and organic deposits., Question: What are formed by soil, sand, clay and organic materials? (A) sedimentary rocks (B) loose soil (C) silts (D) swamp vegetation (E) dams (F) fossil fuels (G) coral reef (H) waterways

A:
A
****