For nonnegative integers x and y, 30x = 49y. Which of the following must be true?
I. x > y
II. y/10 is an integer.
III. \frac{\sqrt{x}}{7} is an integer.
(A) I only
(B) II only
(C) III only
(D) I and II
(E) II and III
I. x > y
II. y/10 is an integer.
III. \frac{\sqrt{x}}{7} is an integer.
(A) I only
(B) II only
(C) III only
(D) I and II
(E) II and III