Depend on what they prefer. Some women hate Ms other like it, most prefer Mrs rather than Ms in the women I have discussed this topic with in your catagories. Try to find the person's inital if writing to them and if addressing them ask how they prefer to be addressed mosty people would then just give you their first name.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.