whiCh sEt is A propEr suBsEt oF E ( ) E= {0,1,2,3}
A．{ x|x is A rEAl numBEr AnD x—3=0}
B．{ x|x is A rEAl numBEr AnD x²—9}
C．{ x|x is A rEAl numBEr AnD x²+5x+6=0}
D．{0,1,2,3)

根据网考网移动考试中心的统计，该试题：

64%的考友选择了A选项

27%的考友选择了B选项

whiCh sEt is A propEr suBsEt oF E ( ) E= {0,1,2,3}A．{ x|x is A rEAl numBEr AnD x—3=0}B．{ x|x is A rEAl numBEr AnD x2—9}C．{ x|x is A rEAl numBEr AnD x2+5x+6=0}D．{0,1,2,3)