The decision hinges on the patient being young and fit. For complete (full-thickness) rectal prolapse, surgeons choose between an abdominal approach and a perineal approach, and the durable, low-recurrence abdominal route is favoured whenever the patient can tolerate it.
So in this healthy young man the operation of choice is abdominal rectopexy, in which the rectum is freed and anchored to the sacrum to abolish the prolapse and its recurrence.
The perineal Delorme operation is the alternative for frail or elderly patients or limited prolapse, and it carries a higher recurrence rate, so it is not picked for a young fit man. Plain anterior resection is not the standard prolapse operation. Goodsall is a rule for tracing anal fistulae and is simply an unrelated distractor here.
$\text{young and fit} \Rightarrow \text{abdominal (rectopexy), most durable}$
\[\boxed{\text{Abdominal rectopexy}}\]