If 5<x<8<y<13, then what is the greatest possible positive integer difference of x and y?
Answers:
A) 3
B) 4
C) 5
D) 6
E) 7

Rationale: "let x = 5.1 and y = 12.1 greatest possible difference = 12.1 - 5.1 = 7 answer e"
Answer: E