PT 24 S2 Q11

Not surprisingly, there are no professors under the age of eighteen. And, ... ...

If the statements above are true, then on the basis of them which one of the following must also be true?
(A) No professors are eighteen-year-olds.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Practice Set: "Drawing Conclusions" Questions, Set 4 - Difficult/Uncommon Mix (25Q)