如图所示程序，下列操作哪个能实现：程序不报错，仅中间红色虚线框中部分不运行？（ ）

A： import turtle turtle.pendown() turtle.forward(150) turtle.left(120) ''' turtle.forward(150) turtle.left(120) """ turtle.forward(150) turtle.left(120) turtle.penup()

B： import turtle turtle.pendown() turtle.forward(150) turtle.left(120) ''' turtle.forward(150) turtle.left(120) ''' turtle.forward(150) turtle.left(120) turtle.penup()

C： import turtle turtle.pendown() turtle.forward(150) turtle.left(120) ### turtle.forward(150) turtle.left(120) ### turtle.forward(150) turtle.left(120) turtle.penup()

D： import turtle turtle.pendown() turtle.forward(150) turtle.left(120) ,,, turtle.forward(150) turtle.left(120) ### turtle.forward(150) turtle.left(120) turtle.penup()