In a group of five friends: Alice, Bob, Charlie, David, and Eva, the following conditions apply: 1) Alice cannot sit next to Bob. 2) Charlie must sit next to David. 3) Eva can sit anywhere. Which of the following arrangements is valid?
Answer: C. Eva, Charlie, David, Alice, Bob
Arrangement c satisfies all conditions: Alice is not next to Bob, Charlie is next to David, and Eva can sit anywhere.