9 George can play the guitar, .......... he? A doesn't B does C can't

Analysis:

This is a tag question. The main clause is 'George can play the guitar'. The auxiliary verb is 'can'. Since the main clause is positive, the tag question should be negative. We use the auxiliary verb 'can' in its negative form, 'can't', followed by the pronoun 'he'.

9. C can't