Trim off all the split ends.Try to keep all your hair the same length.Avoid using straighteners when you can and definitely don't use a high heat setting as that causes permanent hair damage.
At home use a good quality shampoo and conditioner then allow your hair to dry naturally.A good conditioner keeps hair separated and when you brush your hair will prevent breakages.Don't force a brush through knots,detangle them carefully.

All of the styles look good.
I prefer the top but you need to see which one you like.
Consider a very high quality shampoo that will bring out your natural sheen and beauty!

All the styles look basically the same I think.

You'll look good which ever one you choose

what about something like this?

I say option one, I will have to check with my boss, once he wakes up from his cat-nap

Keep it long,

Whichever one you want. It has no effect whatsoever on anyone else.

Go bald.

Get a reverse mohawk.