If 6<x<10<y<17, then what is the greatest possible positive integer difference of x and y?	Pick:
A) 3
B) 4
C) 10
D) 6
E) 7

Rationale: "let x = 6.1 and y = 16.1 greatest possible difference = 16.1 - 6.1 = 10 answer c"
Answer: C