help please

Choose the correct item
ThisisCharlie’s/Charlies’bag.
This is my uncles’/uncle’shouse.
These girls’/girl’sflowersarebeautiful.
The mens’/men’s cars are parked there.
There are womens’/women’s dresses in this shop.
All students’ / student’s classes are canceled.
My dad’s/dads’ sister is my aunt.
Cathy’s/Cathys’ work is the best.
My grandfather’s /grand’sfather room is upstairs.
That cats’ /cat’s eyes are green.