Find parametric equations and a parameter interval for the motion of a particle starting at the point (5,0) and tracing the top half of the circle x + y = 25 four times. Choose a correct possible parametrization below. OA. x = 5 cost, y = 5|sint|, 0 t4 B. x=5+ cost, y = 5- sint, Ost2 C. x= cost 5 |sin t y= -, 0t4 5 OD. x=5 cost, y = 5 sint, 0 t2