Concept:The opposite of wavering is being steady, firm, and not changing one's resolve.
Explanation:The underlined word "wavering" means showing uncertainty or hesitation between different choices.
To fill the gap correctly, we need a word that expresses the opposite idea of steadiness and determination.
"Unswerving" means firm, resolute, and not turning aside from a chosen course.
Thus, it is the most nearly opposite in meaning to "wavering".
The other options, "untrustworthy", "deceptive", and "pretentious", describe negative personal qualities rather than a lack of firmness.
Therefore, "unswerving" is the only word that makes the sentence both meaningful and opposite in sense.
Answer:A. unswerving