Five tasks P, Q, R, S, and T need to be completed. Task P must be done before Q and R. Task S must be done after R but before T. What is the correct order of tasks?

A. P, Q, R, S, T

A box contains red, blue, and green balls. If there are twice as many red balls as blue balls and three times as many green balls as red balls, which color has the least number of balls?

B. BLUE

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. ALICE, DAVID, EVA

If J is the brother of K and K is the father of L, what is J's relation to L?

B. UNCLE

A, B, C, D, and E are five friends who are going to a party. A arrives before B but after C. D arrives before E but after A. What is the order of arrival?

C. C, A, D, B, E