Gisa is taller than Henry but shorter than Justina. Ivan is taller than Katie but shorter than Gisa. The tallest of these five people is
(A) Gisa
(B) Henry
(C) Ivan
(D) Justina
(E) Katie
Let the heights of Gisa, Henry, Ivan, Justina and Katie be $G, H, I, J$, and $K$, respectively. From the first sentence, $H<G<J$. From the second sentence, $K<I<G$. So $J$ is bigger than all of $G, H, I$, and $K$, so Justina is the tallest.

ANSWER: (D)