Dear Daniel:

1-to-1 is a better social context for you, so it is best that whatever contact you do suggest to D should be in this context of just the two of you. My favorite 1-to-1 context is to sit with someone in a coffee shop, it is a public place but not noisy, so there is the benefit of not being totally alone with someone (especially in a beginning-dating situation) and being able to have a private conversation in a quiet enough environment.

Regarding A, I don’t see a reason to  not send her a text. This is the benefit of you not being in a relationship, you are free to contact any woman you want to contact.

anita