If you do not want a spoiled brat monster of a teenager, if you do not want to have a socially inept young adult later in life, curb your daughter now.
I am speaking as a parent, not someone who has no idea what they are talking about. I have to remind myself that my oldest boy is not biologically mine. Try and take him away from me and I'll destroy you, but genetically he is not mine.
He was a horrid little child when he realized I was in his life for good. I loved him, but was stern, I did not tolerate his bad behaviour, and rewarded his good behaviour. As distant and clinical as that sounds it works. That was 8 years ago. I am his best friend, he tells me and his mom the truth even when he knows it will get him into trouble.
Get a C for your daughter. Today, not tomorrow. You want her as self confident and self assured as possible in this world priro to the perils of middle school and high school.
When she is acting poorly, look at her like a mirror, try to see how much of you is in her acting out, and adjust yourself accordingly. It is a work in progress and always will be until she sets off on her own.
Children reflect what they see and know.
Experience is a brutal teacher, but you learn. My God, do you learn. - C.S. Lewis
Life is usually all about how you handle Plan B. - Jack3Beans
Listen without defending; Speak without offending - FaithinAK