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.

[EX Q]: Ribosomes present in a particular cell are smaller than those found in plants. In which taxonomic group or groups could the cell be classified?  
 (A) fungi only (B) archaea only (C) bacteria or archaea (D) bacteria or fungi
[EX A]: C

[EX Q]: What happens to the water vapor in an air mass as it ascends?  
 (A) It freezes. (B) It condenses. (C) It vaporizes. (D) It polarizes.
[EX A]: B

[EX Q]: Many scientists accept the theory that excess emission of carbon dioxide from cars and industry causes a layer of gas in the upper atmosphere that traps heat. This, in turn, causes the average temperature on Earth to rise. Which of the following observations supports that theory?  
 (A) The summer of 1998 was one of the hottest summer seasons on record. (B) Carbon dioxide gas from cars and industry is a product of burning that produces heat. (C) Carbon dioxide in the upper atmosphere reflects heat radiated from Earth's surface. (D) Radiation on Earth's surface is increasing because of a hole in the ozone layer
[EX A]:
C