TASK DEFINITION: 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.
PROBLEM: In a classroom demonstration, a teacher pours sulfuric acid on some granulated sugar in a beaker. The sugar turns yellow and then black. Smoke rises and a strong smell is released. This demonstration is an example of what kind of change?  
 (A) chemical (B) physical (C) magnetic (D) electric

SOLUTION: A

PROBLEM: How do traits of animals such as ear shape, nose shape, and hair color most often get passed to offspring?  
 (A) sexual reproduction (B) asexual reproduction (C) adaptation (D) instinct

SOLUTION: A

PROBLEM: Scientists are able to correlate time and the amount of difference between homologous genes when studying the divergence of two species because scientists have reliable estimates for which value?  
 (A) rate of genetic mutations (B) survival benefit of specific genes (C) pressure of selection on base pairs (D) number of bases in species' genomes

SOLUTION:
A