6868. If you waver at the last minute, you shall face failure.

✅ The correct answer is option D.
Resolve : settle or find a solution to (a problem or contentious matter).

Decide : come or bring to a resolution in the mind as a result of consideration.

Settle : resolve or reach an agreement about (an argument or problem).

Hesitate : pause in indecision before saying or doing something.

Waver : be undecided between two opinions or courses of action.

Synonym of Waver is Hesitate