A group of students: 1, 2, 3, 4, and 5 must be selected based on these rules: 1 and 2 cannot be selected together. 3 must be selected if 4 is selected. 5 can be selected only if 3 is selected. Which of the following selections is valid?
Answer: C. 3, 4, 5
3, 4, and 5 can be selected together without violating any conditions.