Question

a trace of anger was in the generals black eyes, but it was there for but a second, and he said, in his most pleasant manner: \dear me, what a righteous young man you are! i assure you i do not do the thing you suggest. that would be barbarous. i treat these visitors with every consideration. they get plenty of good food and exercise. they get into splendid physical condition. you shall see for yourself tomorrow.\ - \the most dangerous game,\ richard connell
what does general zaroff do to prove that he is civilized?
he shows that he is angry.
he lets his eyes go black.
he pauses for a second.
he speaks in a pleasant manner.

Explanation:

In the text, General Zaroff's display of a pleasant - mannered speech is associated with being civilized as opposed to being barbarous. Expressing anger, having black - eyed appearance or pausing briefly are not indicators of civilization.

Answer:

He speaks in a pleasant manner.