GRE Question of the Day (August 13)

If a and b are positive integers, and x = 2 ⋅ 3 ⋅ 7 ⋅ a, and y = 2 ⋅ 2 ⋅ 8 ⋅ b, and the values of both x and y lie between 120 and 130 (not including the two), then a – b =

(A) –2

(B) –1

(C) 0

(D) 1

(E) 2