Which word most likely means “someone who takes advantage of circumstances”?

If the author of the gift of the magi had made the reader aware of the gifts that jim had purchased in the beginning of the story this would be an example of

The physical injuries thaqt the narrator and other soldiers suffer in ernest hemingways in another country are reprsentative of

Precarious subsistence voracious abysmal wood is to fire as food is to arrowright grinning is to cheerful as teetering is to arrowright conniving is to scheming as terrible is to arrowright mournful is to sad as gluttonous is to arrowright