Mark the letter (A,B,C, or D) on your answer sheet to indicate the sentence that is closest in meaning to the sentence printed before.
My mother goes to the supermarket once in a blue moon.
A.My mother goes to the supermarket only once a month.
B.My mother goes to the supermarket when the moon is full.
C.My mother occasionally goes to the supermarket.
D.My mother goes to the supermarket when the blue moon is on.