Question

Which of the following languages is regular?
(A) {WW^R |W belongs to {0,1}^+}
(B) {WW^RX | X,W belongs to {0,1}^+}
(C) {WXW^RX | X,W belongs to {0,1}^+}
(D) {XWW^RX | X,W belongs to {0,1}^+}