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]: 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.
[EX A]: C

[EX Q]: A scanning electron microscope is best suited for observing  
 (A) diffraction of light. (B) tectonic features on planets. (C) the surfaces of small objects. (D) topographical features on the ocean floor.
[EX A]: C

[EX Q]: Ferns belong to any one of about 12,000 species of plants grouped in their own division within the plant kingdom. Ferns are vascular, seedless, flowerless, and reproduce by spores. To which plant group do ferns belong?  
 (A) Bryophyta (B) Gymnosperm (C) Angiosperm (D) Pteridophyta
[EX A]:
D