‘I had a choice’ How does this prove Rita is educated by the end of the play?

‘I had a choice’ How does this prove Rita is educated by the end of the play?

Rita, a dissatisfied hairdresser, is driven by a sense if incompleteness as she is trapped by her working class life, she thinks an education will set her free, strives to change classes from working to middle class and aims to reach her goal through an open university course, hoping it will increase her opportunities and ability to make choices in life.
Rita's main reason for wanting an education is so she can have choice, she tells Frank that everyone thinks they have choice but they all think choice is deciding what drink to have, what song to sing or what to wear. Rita knows this is not choice; choice is something that will change her life. Rita is fed up of other people making her choices for her like Denny wanting her to have a baby,
"He thinks we have choice already, choice between Everton an Liverpool, choosing which washing powder… I told him id only have a baby when I have choice."
Rita...