instruction:
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").
question:
Fact1: Male dogs use pheromones in urine to mark their territory., Fact2: Pheromones are natural aphrodisiacs., Question: What do male dogs use in urine to mark their territory? (A) Natural aphrodisiacs (B) competing for resources (C) Tails (D) Urine  cleaner (E) Something coming from a gland (F) Chemical energy (G) an area swollen with pus (H) Chew toys
answer:
A


question:
Fact1: poisonous darts are used for defense by sea anemones, Fact2: Protection at the gateway is the best defense., Question: What are used as protection by sea anemones? (A) lamphreys (B) poisonous darts (C) tubular organ (D) feed on dead protists (E) coelenterates (F) islets of Langerhans (G) related organisms (H) moisturize their skin
answer:
B


question:
Fact1: a speedometer is used for giving a driver feedback on the speed of their vehicle, Fact2: Odometers and speedometers measure distance and speed., Question: What does a speedometer measure? (A) gas usage (B) local weather conditions (C) 295 degrees Kelvin (D) the rate of travel (E) occurs over a wide range (F) temperature (G) vibrations (H) 70-75 degrees Fahrenheit
answer:

D