Five tasks P, Q, R, S, and T need to be completed. Task P must be completed before Q, and R must be completed before S. Task T can be done at any time. What is a possible sequence of completing the tasks?

D. P, R, Q, S, T

Five books are arranged on a shelf. Book A is to the left of Book B but to the right of Book C. Book D is to the right of Book E but to the left of Book A. What is the sequence of the books from left to right?

D. E, C, A, B, D

Four friends, A, B, C, and D, went to a party. A arrived before B but after C. D arrived after B. What is the correct order of arrival?

A. C, A, B, D

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

B. R, S, P, Q, T

In a race, the following positions were recorded: A finished before B, C finished after D, and E finished last. What is the correct order of finishers?

A. A, B, D, C, E