Determine which legal clause the following paragraph belongs to: (a) ifdeliveredpersonally,atthetimeofdelivery; (b) ifdeliveredbycommercialcourier,atthetimeofsignatureofthecourier'sreceipt; (c) ifsentbypre-paidfirst-classpostorrecordeddelivery,at9.00amonthesecondday afterposting; (d) ifsentbyairmail,fivedaysfromthedateofposting;or (e) ifsentbyemail,theintendedrecipientrepliedtotheemailandspecifically acknowledgedreceipt.