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 can only be selected if David is also selected. 3) Eva can be selected regardless of the others. Which of the following groups can be selected?

Answer: C. Charlie, David, Eva
Charlie can only be selected if David is selected, and Eva can be selected regardless of the others, making 'Charlie, David, Eva' a valid group.