Response Cards - Etiquette ?

Hi, two questions before I order my invitations...

The response cards are coming to me, which is correct?

1. Miss Marcia Brady
2. Ms. Marcia Brady
or 3. Marcia Brady

Also, we live at an apartment, do I include 'Apt.' or 'Apartment' or can I get away with this?

Marcia Brady
123 Main Street - 3W
New York, New York 12222

TIA

Ms. is always for an adult.

Miss is for a young girl--probably under 18.

so it should be Ms. Marcia Brady

1. Ms. Marcia...
2. Apartment (spelled out)