@Jaimee-Salgado if S is the third program, it would be at either 2 or 2:30, depending on whether G is one of the first two programs. Stated another way, G must appear either at 1pm or 3pm.
If G is shown at 1pm, the following scenario results:
1 G G 2 R S 3 W T
If G is shown at 3pm, the following scenario results:
1 R T 2 S W 3 G G
Notice that in both of these hypotheticals, W is the four program:
(1) G, R, S, W (2) R, T, S, W
So (D) must be true and (D) would be the correct answer.
Hope that helps! Please let us know if you have any other questions.
