PT 23 S1 Q24

Five candidates for mayor—Q, R, S, T, and U—will each speak ... ...

If S, T, and U speak second at meetings 1, 2, and 3, respectively, which one of the following must be true?
(A) The fifth speaker at at least one of the meetings is either Q or R.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Seq. Assignment: Lesson Set 3 (of 3) - Subcategories