Help asap please i only have abt 20 minutes left to turn this in, it is a quiz, and the last question- please help me- Which two points on the number line represent numbers that can be combined to make zero? B and D A and B C and D A and C

Due to a packaging error, 4 cans labeled diet soda were accidentally filled with regular soda and placed in a 12 pack carton of diet soda. two cans were randomly selected from this 12 pack. what is the probability that both cans were regular soda?