Three People Are Asked Their Opinions on a Political Issue

Three people are asked their opinions on a political issue.They can answer Opposed (O) or Undecided (U) .Find the sample space S. ​

A) {OOO, OOU, OUO, UOO, UUU, UUO, UOU}
B) {OOO, OOU, UOO, UUU, UUO, UOU, OUU}
C) {OOO, OOU, OUO, UOO, UUO, UOU, OUU}
D) {OOO, OUO, UOO, UUO, UOU, OUU}
E) {OOO,OOU,OUO,UOO,UUU,UUO,UOU,OUU}