If something would have been justifiably regretted if it had occurred, then it is something that one should not have desired in the first place. It follows that many forgone pleasures should not have been desired in the first place. The conclusion above follows logically if which one of the following is assumed? ['Everything that one desires and then regrets not having is a forgone pleasure.', "One should never regret one's pleasures.", 'Many forgone pleasures would have been justifiably regretted.', 'Forgone pleasures that were not desired would not have been justifiably regretted.']