Concept:Emphatic stress is used to contrast one word with another in a question.
The capitalized word in the answer points to the exact part the question got wrong.
Explanation:The sentence "HE is the press photographer" stresses HE.
This means the correct question must have used a different pronoun.
The word HE corrects SHE in the question.
Option A asks: "Is she the press photographer?"
To that, the suitable reply is: "HE is the press photographer."
Options B, C, and D already use HE.
They change tense or other details, not the pronoun.
So they do not need HE to be emphasized.
Answer:A. Is she the press photographer?