Write the following sets.(a) The set of letters used in the sentence "List the elements in a set only once."(b) The set of letters that are needed to spell the words "team", "meat", "mate", and "tame"(c) The set of states in the United States that contain the letter Q(a) Choose the correct answer below.OA. {l,i,s,t,h,e,m,n,a,o,y,c}OB. {l,s,t,h,e,m,n,a,o,y,c}OC. {l,i,s,t,h,e,m,n,a,o,y,e}OD. (l,i,s,t,h,e,n,a,o,y,c}