In a group of five friends: Alice, Bob, Charlie, David, and Eva, the following conditions apply: 1) Alice cannot be selected if Bob is selected. 2) Charlie must be selected if Eva is selected. 3) David can only be selected if Alice is not selected. Which of the following groups can be selected?

Answer: C. Charlie, David, Eva
Charlie must be selected if Eva is selected, and David can only be selected if Alice is not selected. Therefore, the only valid group is Charlie, David, and Eva.