His command were so peremptory that we felt humiliated.

The correct answer is C. dictatorial.

A peremptory command is one that is given in a very forceful and demanding way, and that leaves no room for discussion or negotiation. This type of command can often make people feel humiliated, as they may feel like they are being treated like children or subordinates.

The other options are not as accurate descriptions of the word “peremptory.” Specious means “apparently true but actually false,” and while a peremptory command may be false,

it is not necessarily specious. Poignant means “causing sadness or regret,” and while a peremptory command may cause sadness or regret, it is not necessarily poignant. Rough means “not smooth or even,” and while a peremptory command may be rough, it is not necessarily rough in the sense of being unkind or harsh.