Howard reached tentatively behind him , all the while wondering what he got up to last night , his mind whirling with potential possibilities . The smell of alcohol and perfume brought him back to his senses : of course , it was Vince . Who else would it be ?

Q with options: Give answer the following question using evidence from the above passage: What may be the reason his mind was whirling with possibilities ?
Choose from: [I] None of the above choices . [II] He has a history of waking up at home wondering who he is . [III] He has done alot of amazing things when drunk that he forgets . [IV] He has a history of exercising poor judgement when he is drunk .
[IV]