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: cell division often causes growth, Fact2: Mitosis is cell division., Question: What often causes growth? (A) exercise (B) hormones (C) Atrophy (D) collagen (E) Earthworms (F) Apoptosis (G) Necrosis (H) Mitosis
[EX A]: H

[EX Q]: Fact1: Secondary meristem is located within and around the vascular tissues., Fact2: Plant tissues are produced from meristems., Question: What has vascular tissue? (A) rocks (B) the Sun (C) trees (D) plants (E) grass (F) Conifers (G) all plankton (H) Oak
[EX A]: D

[EX Q]: Fact1: a ruler is used for measuring the length of an object, Fact2: Length Rope lengths are measured in meters., Question: What can a ruler measure the meters of? (A) an imaginary distance (B) a black hole (C) quarks (D) loose soil (E) animals (F) athletes (G) sea urchins (H) an object
[EX A]:
H