If a and b are different positive integers and a + b = b(a + b), then which of the following must be true?
I. a = 1
II. b < a
III. b = 1	Select the correct option
A) I only B) II only C) III only D) II and III E) I and III
b has to equal a squared, and that only works if b is 1. There are no positive integers less than 1, soII and III are correct.   Answer : II and III
<result>D</result>
If a and b are different positive integers and a + b = b(a + b), then which of the following must be true?
I. a = 1
II. b < a
III. b = 1