Detailed Instructions: 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:A student's mother is heterozygous for attached earlobes, a recessive trait. The student's father is also heterozygous for that trait. What is the percent likelihood that this student has attached earlobes?
(A) 0% (B) 25% (C) 50% (D) 75%
Solution:
B