Task: Explanation
Input (English): The babies birthday is the day their parents met.
(A) Birthdays are happy days and the day of birth is happier than the day of parents meeting.
(B)Birthdays must refer to the days and most parents meet at night time
(C)A birthday refers to the day you were conceived as a way to refer to your age so it cannot be the day your parents met.
Output (English): C