单项选择题

A.x=-2*pi:0.1:2*pi;plot(x,sin(x))
B.x=-2*π:0.1:2*π;plot(x,sin(x))
C.x=-2*pi:2*pi;plot(x,sinx)
D.x=-2*3.1416:0.1:2*3.1416;plot(x,sinx)