"Miss," "Mrs.," or "Ms"?

I am solidly pro-choice. In other words, every woman has the right to choose which courtesy title, if any, she wishes to use, so you will have to ask each woman what her individual preference is, regardless of her marital status or age.

By the same token, each man has the right to choose which courtesy title (Master, Mr., Jr. etc.), if any, he wishes to use.