Is it wrong to tell my 16year old daughter that she must earn a 3.0 gpa or higher if she wants a brand new car for graduation?

If she gets below a 3.0 unless it is a medical or catastrophic situation then I will only buy her a used 2005 Chevy aveo. If she graduates in 2019 wit a 3.0 or higher I will buy her a new Nissan or Honda.

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