If 0 < a < b < c < 1 , which of the following are positive?
I.	b-c
II.	a-b
III.	c-a Choose the correct choice from the following answers:
A) I only
B) II only
C) III only
D) I and II
E) I and III
We could solve this easily using examples.   I is false since b<c and="" are="" b<c="" both="" c="" false="" ii="" iii="" is="" positive="" since="" true="">a and both are positive   So, the answer is III only.</c>
<result>C</result>
If 0 < a < b < c < 1 , which of the following are positive?
I.	b-c
II.	a-b
III.	c-a