Explanation:

The word 'fractious' means irritable and quarrelsome, or difficult to control; unruly. A synonym would be a word with a similar meaning. Option C ('contentious') means causing or likely to cause an argument; controversial, or given to arguing. This aligns well with 'fractious'. Option A ('affable') means friendly. Option B ('ingratiating') means intended to gain approval. Option D ('acquiescent') means ready to accept something without protest. These are all antonyms or unrelated.