Universe U : all students in this session. C(x) : Person x is a computer science major student. Q(x) : Person x took Quiz 1. G(x) : the grade of person x in Quiz 1. Choose the equivalent proposition for "Each student either received a grade of 0 for Quiz 1 or took Quiz 1." x((G(x)=0)Q(x)) x((G(x)=0)Q(x)) x((G(x)=0)Q(x)) x((G(x)=0)Q(x))