PLEASE HELP
(1) It was a bright cold day in April, and the clocks were striking thirteen. Winston Smith, his chin nuzzled into his breast in an effort to escape the vile wind, slipped quickly through the glass doors of Victory Mansions, though not quickly enough to prevent a swirl of gritty dust from entering along with him.

In Passage 1, there are many things that Winston knows which the reader does not. Which sentence relies on dramatic irony to build suspense
A)

“In the far distance a helicopter skimmed down between the roofs, hovered for an instant like a bluebottle, and darted away again with a curving flight.”

B)

“Only the Thought Police mattered.”

C)

“The instrument (the telescreen, it was called) could be dimmed, but there was no way of shutting it off completely.”

D)

“It was one of those pictures which are so contrived that the eyes follow you about when you move.”