But someone still was yelling out and stumbling And flound’ring like a man in fire or lime.—

Dim through the misty panes and thick green light,

As under a green sea,

I saw him drowning.

In all my dreams before my helpless sight,

He plunges at me, guttering, choking, drowning.

The incident in this poem is:

A. a gas attack.

B. an airplane attack.

C. a sinking submarine.

D. the movement of troops by taxicab to Paris.