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.

[Q]: In humans, B is the allele for brown eyes and b is the allele for blue eyes. Two brothers both have brown eyes, but one of them has both the B and b alleles while the other only has B alleles. Which statement is true about the brothers?  
 (A) They have the same genotype and phenotype. (B) They have different phenotypes and genotypes. (C) They have the same phenotype but different genotypes. (D) They have the same genotype but different phenotypes.
[A]: C


[Q]: What kind of energy conversion occurs after a candle is lit?  
 (A) friction to electrical energy (B) light energy to heat energy (C) mass to kinetic energy (D) chemical energy to light energy
[A]: D


[Q]: Which characteristic of a cell membrane allows it to control materials entering and leaving a cell?  
 (A) A cell membrane is surrounded by fluid. (B) A cell membrane is semipermeable. (C) A cell membrane holds organelles in place. (D) A cell membrane is found in plant and animal cells.
[A]:
B