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

C. S, T, P, Q, R

In a race, five participants A, B, C, D, and E finish in the following order: A finishes before B but after C. D finishes before E but after B. What is the correct sequence of finishers?

A. C, A, B, D, E

In a race, five runners A, B, C, D, and E finish in the following order: A finishes before C but after B. D finishes before E but after A. What is the sequence of finishers?

A. B, A, C, D, E

Five students, P, Q, R, S, and T, presented their projects in a competition. P presented first, R presented after S, and T presented before Q. What is the correct order of presentations?

D. P, S, T, R, Q

Five books were read by a group of friends in a week. Book A was read before Book B, Book C was read after Book A, and Book D was read before Book E. What is the correct sequence of reading?

C. A, C, D, B, E