Choose a word similar to the group: Strong, Sturdy, Robust.

C. POWERFUL

Choose a word similar to the group: Calm, Peaceful, Tranquil.

C. SERENE

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

C. CHARLIE, DAVID

A committee of four members is to be formed from the following candidates: P, Q, R, S, and T. The selection criteria are: 1) P and Q cannot be on the committee together. 2) R must be included if S is included. 3) T can be included only if P is included. Which of the following combinations is valid?

C. R, S, T

From the following items: 1) Red, 2) Blue, 3) Green, 4) Yellow, and 5) Black, the selection criteria are: 1) Red and Blue cannot be selected together. 2) Green must be selected if Yellow is selected. 3) Black can only be selected if Red is selected. Which of the following selections is valid?

C. GREEN, YELLOW