Will you, like the . . . . . . . gentleman and soldier you are, leave at once before he finds you here?

The correct answer is C. chivalrous.

A chivalrous person is someone who is courteous, polite, and respectful, especially towards women. In this context, the speaker is asking the listener to leave because they are in danger. The speaker is calling the listener a “gentleman and soldier” because they are hoping that the listener will act in a chivalrous way and leave to protect themselves.

The other options are not correct because they do not describe someone who is courteous, polite, and respectful.

• A barbarous person is someone who is cruel and violent.
• An ostentatious person is someone who is showy and extravagant.
• A luminous person is someone who is bright and shining.