QUESTION $7$

Assume that the POST method is used. Which of the following statements gets the value of the radio button that's on in the delivery group and

stores it in a variable named $card$\_$type?

USPS

Federal Express

UPS

a$.$ Scard$\_$type $=$ filter$\_$input$($INPUT$\_$POST, 'card$\_$type'$)$;

b$.$ Scard$\_$type $=$ isset$($$$\_$POST$[\text{'}$card$\_$type'$]$;

c$.$ Scard$\_$type $=$ filter$\_$input$($INPUT$\_$POST, 'delivery'$)$;

d$.$ Scard$\_$type $=$ isset$($$$\_$POST$[\text{'}$delivery$\text{'}]$