If a > 0 and b < 0, which of the following are true?
I. a/b < 0
II. b/a < 0
III. a + b < 0  Choose the correct choice from the following answers:
A) I only  B) II only  C) III only  D) I and II only  E) I, II, and III
I. True, a is positive and b is negative so a/b must be negative   II. True, a is positive and b is negative so b/a must be negative   III. Not true, example: a = 5, b = -3, so a + b = 2   I and II only
<result>D</result>
If a > 0 and b < 0, which of the following are true?
I. a/b < 0
II. b/a < 0
III. a + b < 0