💡 Detailed Explanation
「～を禁じ得ない (wo kinjienai)」 means to be unable to suppress a naturally arising emotion. It connects to nouns representing feelings like anger (怒り), tears (涙), or sympathy (同情). The other options are grammatically incorrect or do not fit the context. 「ずにはすまない」 means an obligation "must do," 「ないではいられない」 refers to an uncontrollable urge to *do* something, and 「ようがない」 means "there is no way to do."