Thirty different integers are chosen at random from the integers 1-50 inclusive. Which of the following statements must be true?

I. At least on of the integers chosen is odd

II. At least one of the integers chosen is a multiple of 5

III. At least on one of the integers choses is less than 15

A) I
B) II
C) I and II
D) I and III
E) I, II and III