[ Grammar ]
(1) Roger was all by himself on guard duty in the middle of the night. (2) When he heard a noise, he called out, “Who goes there?” (3) Suddenly, a hooded man stepped out from behind a corner and showed his face. (4) “I’m glad it’s just you,” he said.
In which sentence is it unclear to whom or what the pronoun refers?
A. 1
B. 2
C. 3
D. 4

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