Mateo is constructing an equilateral triangle inscribed in a circle with center P. He draws the diameter of the circle through center P using a straight edge. Next he opens his compass to a width equivalent to the radius of the circle. What is his next step?

A. Place the point of the compass on the center of the circle and mark off arcs to the left and right.

B. Place the point of the compass in one of the locations where the diameter intersects the circumference and mark off arcs on either side.

C. Place the point of the compass on the edge of the circle and mark off arcs all the way around.

D. Place the point of the compass on the edge of the circle and mark off two arcs.