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 Input:
Different units of measurement are more useful in some settings than in others. Which unit of measurement is most used when comparing distances within the solar system?
(A) the mile (B) the kilometer (C) the light year (D) the astronomical unit

Ex Output:
D

Ex Input:
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 Output:
C

Ex Input:
Which of the following best describes the number of chromosomes in a normal human liver cell?
(A) 23 pairs of chromosomes (B) 46 different types of chromosomes (C) 46 male chromosomes and 46 female chromosomes (D) 23 original chromosomes and 23 duplicate chromosomes

Ex Output:
A