The Above Table Shows 6 Test Procedures (P to U)

The above table shows 6 test procedures (P to U) that must now be entered into a test execution schedule. Business severity is regarded as the most important element in determining the sequence of the test procedures, but other dependencies must also be taken into consideration. Regression testing can only be run once all other tests have completed. Which of the following represents the MOST effective sequence for the test execution schedule (where the first entry in the sequence is the first procedure to be run, the second entry is the second to be run and so on) ?

A) S, R, P, T, Q, U
B) P, R, T, Q, S, U
C) R, P, S, T, Q, U
D) P, Q, R, S, U, T