This, but I'd go with 2 if her personality fits in well with yours. 3 might be nervous, quiet or just plain weird. Personally I wouldn't like to find out, especially if I already had another candidate in mind.
When I worked at comet christ knows how many years ago, I was involved in some interviews and we had a very quiet girl who attended. She was a bonny lass, but when asked what she knows about tablets she said she only knows about paracetamol but doesn't take them often, even though she was in an interview for an electrical store. Quiet can sometimes hide dense, but we got lucky that day. Maybe you won't though!