instruction:
You are given a science question (easy-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.
question:
A pot is heated on a stove. Which process causes the metal handle of the pot to also become hot?  
 (A) combustion (B) convection (C) radiation (D) conduction
answer:
D


question:
Which of these substances is correctly identified as a mineral?  
 (A) coal (B) quartz (C) granite (D) sandstone
answer:
B


question:
An unusual type of fossil clam is found in rock layers high in the Swiss Alps. The same type of fossil clam is also found in the Rocky Mountains of North America. From this, scientists conclude that  
 (A) glaciers carried the fossils up the mountains (B) the Rocky Mountains and the Swiss Alps are both volcanic in origin (C) clams once lived in mountains, but have since evolved into sea-dwelling creatures (D) the layers of rocks in which the fossils were found are from the same geologic age
answer:

D