Using canvas to draw a graphic, and which option is correct about the following code snippets? ( )ctx.beginPath();ctx.arc(50,170,50,0,Math.PI,false);ctx.stroke();ctx.closePath();
using "inset" to set the inner shadow in box-shadow.
C.
the default color in box-shadow is black.
D.
In the box-shadow attribute, a negative value in the horizontal direction means moving to the right, and a negative value in the vertical direction means moving down.