If it were me (even though that obviously isn't my circumstance), the explanation would be B. If the option were A, then I wouldn't have been kissing her at the end of the date, and I certainly wouldn't have given the whole "I had fun last night, we should do that again some time" deal. If it were option C, there wouldn't have been a date in the first place...perhaps it's just my uni student budget (both for time and money) speaking, but I'm not going to take a girl out, devote my time, energy and resources to entertaining her and building a connection unless I'm already pretty keen on her.
But as you know, that's me, and my attitudes towards dating/relationships/sex etc are seldom conventional.