Topic: Right Form of Verb,

Best Answer Explained in Below-:

In the context of the sentence, "He threatened to -- her for every penny she had if she tried to break her correct," we are looking for a word that conveys an action of taking money from her in a threatening manner.

Among the provided options:

A) "rob" suggests using force or intimidation to take someone’s money, which aligns perfectly with the context of a threat. The phrase implies a confrontational scenario, where the threat of robbery serves to instill fear and control over her actions.

B) "sue" means to take legal action against someone, typically in a court setting. While it might fit into a context involving legal disputes, it lacks the threatening and coercive connotation that the word "rob" carries.

C) "case" does not apply here grammatically or contextually, as it does not fit the action of threatening someone regarding their money in this scenario.

D) "marry" is completely unrelated since it refers to a personal relationship rather than any financial threat.

Thus, option A) "rob" is the only word that effectively conveys the intended meaning of intimidation regarding her finances, making it the correct choice.