Which statement correctly computes and stores the area of a circle with radius equal to $r?$

Select one

A$.$ double area $=$ Math.PI$*$r$**$r;

B$.$ String area $=$ Math.PI$*$r$*$r;

C$.$ int area $=$ Math. $PI*$r$*$;

D$.$ literal area $=$ Math.$PI*$r$*$r;