Topic: Antonyms,

Best Answer Explained in Below-:

The term "resolute" describes someone who is firmly determined, unwavering, and confident in their decisions or beliefs. In contrast, the word "vacillating" refers to the state of being indecisive, oscillating between different opinions or courses of action. Therefore, "vacillating" serves as a direct antonym to "resolute," which embodies certainty and determination.

Analyzing the other options:

- A) "persevering" implies persistence in a course of action, which aligns more closely with resoluteness rather than opposing it.

- B) "steadfast" denotes loyalty or firmness in purpose, again reinforcing a sense of resolution rather than contradicting it.

- C) "unyielding" suggests rigidity or inflexibility, and while it may seem to contrast with some aspects of resolution, it does not embody indecisiveness.

In summary, "vacillating" best represents the opposite of "resolute" due to its inherent quality of uncertainty and fluctuation in commitment, distinguishing it clearly from the other choices, which all denote strength or persistence in one's decisions.