<i>In the question below choose the word(s) or phrase(s) which <b>best fills</b> the gap(s).</i>:The child's recent training has not been very effective, he is likely to .... to his old habits

In the question below choose the word(s) or phrase(s) which best fills the gap(s).: The child's recent training has not been very effective, he is likely to .... to his old habits

In the question below choose the word(s) or phrase(s) which best fills the gap(s).:

The child's recent training has not been very effective, he is likely to .... to his old habits

The correct answer is A. revert

No explanation given