已定义如下类模板:templateclassABC{......};则下列哪条语句是错误的?()
A: ABCobj;
B: typedefABCDoubleABC;
C: classDerived:publicABC{......}
D: templateclassDerived:publicABC{......}
A: ABCobj;
B: typedefABCDoubleABC;
C: classDerived:publicABC{......}
D: templateclassDerived:publicABC{......}