以下不能正确创建输出文件对象并使其与磁盘文件相关联的语句是

A．ofstream myfile;myfilopen("d:ofiltxt");
B．ofstream*myfile=new ofstream;myfile-＞open("d:ofiltxt");
C．ofstream myfile("d:ofiltxt");
D．ofstream*myfile=new("d:ofiltxt");