What does the following program do?Import turtleDef main(): turtle.hideturtle() square(100,0,50,'blue')Def square(x, y, width, color): turtle.penup() turtle.goto(x, y) turtle.fillcolor(color) turtle.pendown() turtle.begin_fill() for count in range(4): turtle.forward(width) turtle.left(90) turtle.end_fill()Main()
选项：

A: It draws a blue square at coordinates (100, 0), 50 pixels wide, starting at the top right corner.
B: It draws a blue square at coordinates (0, 50), 100 pixels wide, starting at the top right corner.
C: It draws a blue square at coordinates (100, 0), 50 pixels wide, in the lower-left corner.
D: Nothing since you cannot call a function with turtle graphics.