A class of students consists of John, Sarah, Mike, and Lisa. The following conditions are given: 1) John cannot be in the same group as Sarah. 2) Mike must be in the same group as Lisa. Which of the following groups is valid?

A. JOHN, MIKE, LISA

A team of four players: X, Y, Z, and W is to be selected based on these conditions: 1) Only players who scored more than 50 points in the last game can be selected. 2) X scored 60 points, Y scored 45 points, Z scored 70 points, and W scored 50 points. Which players can be selected?

C. X AND Z

In a group of five friends: Alex, Brian, Charlie, David, and Edward, the following conditions apply: 1) Alex is taller than Brian but shorter than Charlie. 2) David is shorter than Edward. 3) Charlie is not the tallest. Who is the tallest among them?

C. EDWARD

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

D. CHARLIE, DAVID, EVA

A, B, C, D, and E are five different colored balls. The following conditions apply: A is not red, B is blue, C is green, D is not blue or green, and E is red. Which ball is yellow?

D. D