小明今天去高级中学参加升学考试,其行进路线如图所示.请说明其行进路线方向的变化( )
A:东北→正东→正北
B:正北→东北→西北
C:正北→正东→西北
D:东北→正东→西北
—Sorry, she isn't here now. She to Shanghai.