In the poset (Z⁺, |) (where Z⁺ is the set of all positive integers and | is the divides relation) are the integers 9 and 351 comparable?

In the poset (Z⁺, |) (where Z⁺ is the set of all positive integers

1.	In the poset (Z⁺, \|) (where Z⁺ is the set of all positive integers and \| is the divides relation) are the integers 9 and 351 comparable?
A.	comparable
B.	not comparable
C.	comparable but not determined
D.	determined but not comparable
Answer» B. not comparable