如下图所示,刀具起点在(-40,-20),从切向切入到(-20,0)点,铣一个φ40mm的整圆工件,并切向切出,然后到达(-40,20)点。根据示图中的刀具轨迹判断,正确的程序是( )。
A.
… N010 G90 G00 G41 X20.0 Y-20 D01; N020 G01 X-20.0 Y0 F200.0: N030 G02 X20.0 Y0 120.0 J0; N040 G01 X-20.0 Y20; N050 G00 G40 X-40.0 Y20.0
B.
… N010 G90 G00 G41 X-20.0 Y-20 D01; N020 G01 X-20.0 Y01 D01 F200.0: N030 G02 X-20.0 Y0 I-20.0 J0; N040 G01 X-20.0 Y20; N050 G00 G40 X-40.0 Y20.0
C.
… N010 G90 G00 X-20.0 Y-20; N020 G01 X-20.0 Y0 F200.0: N030 G02 X-20.0 Y0 I-20.0 J0; N040 C01 X-20.0 Y20; N040 G01 G00 X-20.0 Y20.0 …
D.
… N010 G90 G00 X-20.0 Y-20.0; N020 G91 G01 G41 X20.0 Y0 D01 F200.0: N030 G02 X-20.0 Y0 I20.0 J0; N040 G01 X-20.0 Y20.0: N040 G01 X-20.0 Y20.0