(A) The probability of choosing a bottle of diet soda is 14/27, since there are 27 bottles in total and 14 of them are diet soda.
(B) The probability of choosing a bottle of regular soda is 5/27, since there are 27 bottles in total and 5 of them are regular soda.
(C) The probability of choosing a bottle of water is 8/27, since there are 27 bottles in total and 8 of them are bottles of water.
Hope that helped.