18. 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 Scard type? USPS Pederal Express UPS a. Scard_type -issot ( POST['delivery':) b. $card type -isset ($ POST['card type'1: c. Scard-type-S POST('delivery'); d, $card-type= $ POST('card-type'); 19. Assume that the second radio button in the code below has been selected by the user. When you get the value of that radio button, what will the value be? USPS Pederal Kinput type "radio namo-"delivery" value-UPS DUPS a. FedEx b. Federal Express c. fedex d. federal express Express 20. Assume that the statements that follow get the data from a text area named comments. After these statements are executed, how will the Scomments variable be displayed by an echo statement? Soomments $ POSTI'commonts'1: a. With character entities for both special characters and new line characters b. With