Which line from Act II of The Importance of Being Earnest is an epigram?

An epigram is a brief, witty statement that expresses an unexpected or pointed idea. The line “It is always painful to part from people whom one has known for a very brief space of time” humorously reverses expectations: a very short acquaintance would not usually make parting especially painful. That clever contrast makes choice B an epigram.

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