Passage Summary: If you would have been right to regret something actually happening, then you shouldn't have wanted it to happen. Therefore, many of the fun things people missed out on were things they shouldn't have wanted.

Conclusion: Many pleasures that people missed out on should not have been desired to begin with.

Reasoning: If an event's occurrence would have resulted in justifiable regret, then desiring that event initially was inappropriate.

Analysis: To solve this Sufficient Assumption question, we need to bridge the gap between the premise's trigger and the conclusion's subject. The premise gives us a rule: 'Justifiable Regret' leads to 'Should Not Have Desired.' The conclusion then jumps to 'Many Forgone Pleasures.' To make this logic airtight, we must assume that many of those forgone pleasures would have actually caused justifiable regret if they had occurred. Look for an answer that explicitly connects these two concepts.