💡 Detailed Explanation
The correct answer is 「かねない」 (kanenai) after a Masu-stem, meaning 'could/might (cause a bad result)'. It expresses fear of an unwanted outcome. 「かねる」 means 'cannot/difficult to do'. 「がたい」 means 'difficult to (cognitively) do' (e.g.,信じがたい). 「得ない」 (enai) means 'impossible'.