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: transportation technology is used for moving people, Fact2: Model rocketry is an exciting way to study transportation technology., Question: Model rocketry can be used to study how people are what? (A) able to read (B) warm (C) dead (D) living (E) moved (F) born (G) humans (H) moved by emotion
[EX A]: E

[EX Q]: Fact1: Biodiversity increases the productivity and stability of ecosystems., Fact2: Ecotourism, on the other hand, can help to conserve biodiversity., Question: What increases the stability of ecosystems? (A) overpopulation (B) water consumption (C) loose soil (D) Quality of life (E) agriculture (F) deforestation (G) ecotourism (H) trees
[EX A]: G

[EX Q]: Fact1: erosion can cause a landslide, Fact2: Landslides Seismic vibration is a common triggering mechanism for landslides., Question: What can cause seismic vibrations, which are triggering mechanisms? (A) wind (B) erosion (C) vehicles (D) flooding (E) waves (F) rivers (G) energy (H) mines
[EX A]:
B