In a group of five friends: Alice, Bob, Charlie, David, and Eva, Alice is taller than Bob but shorter than Charlie. David is shorter than Eva but taller than Bob. Who is the tallest among them?
A team of three is to be formed from the following people: Alex, Brian, Clara, and Diana. The selection rules are: 1) Alex and Brian cannot be selected together. 2) Clara must be included if Diana is included. Which of the following teams is valid?