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: Loss of ozone has created an ozone hole over Antarctica., Fact2: Antarctica's ozone layer is threatened by depletion., Question: What can loss of ozone lead to? (A) irritants (B) bad weather (C) Car accidents (D) ozone hole (E) rain (F) A hurricane (G) stormy weather (H) destroyed crops
[EX A]: D

[EX Q]: Fact1: Carbon may be stored in sedimentary rock for millions of years., Fact2: Limestone is a type of sedimentary rock., Question: What element can be stored in limestone for millions of years? (A) oxygen (B) Energy (C) matter (D) carbon (E) sodium (F) helium (G) rock salt (H) heat
[EX A]: D

[EX Q]: Fact1: an anemometer is used to measure wind speed, Fact2: An anemometer and vane are at the top of the station., Question: Where is the device to measure wind placed? (A) At the top of a station (B) Being over land (C) local weather conditions (D) Underwater (E) Inside a tree (F) points north (G) Inside a station (H) when it passes over a continent
[EX A]:
A