TASK DEFINITION: You are given a science question (hard-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: Two flowers are both roses. One rose is larger and has more fragrance than the other rose. What advantage will one of the roses most likely gain because of this difference?  
 (A) The larger rose will have fewer petals than the smaller rose. (B) The larger rose will more easily attract bees than the smaller rose. (C) The smaller rose will have more pollen than the larger rose. (D) The smaller rose will grow faster than the larger rose.

SOLUTION: B

PROBLEM: A duck and turtle are different types of animals. In which way are the duck and the turtle alike?  
 (A) They both hibernate. (B) They both have feathers. (C) They both reproduce by laying eggs. (D) They both provide milk for their young.

SOLUTION: C

PROBLEM: The alkaline earth metal elements are in the same family in the periodic table because they all have  
 (A) one valence electron. (B) two valence electrons. (C) seven valence electrons. (D) eight valence electrons.

SOLUTION:
B