If x-y=8, which of the following must be true?
I. Both x and y are positive
II. If x is negative, y must be negative
III. If x is positive, y must be positive Choose the correct choice from the following choices:
A) I only B) II only C) III only D) I and II E) II and III
If x-y=8, which of the following must be true?   I. Both x and y are positive   II. If x is positive, y must be positive   III. If x is negative, y must be negative   1. x and y can be negative, for instance, -2 - (-10) = 8 =&gt;Eliminate A and D   2. x can be positive and y can be negative, for instance, 2 - (-6) = 8 =&gt; Eliminate II only and E   A) I only   II only) II only   C) III only   D) I and II   E) II and III   Answer II only
<result>B</result>
If x-y=8, which of the following must be true?
I. Both x and y are positive
II. If x is negative, y must be negative
III. If x is positive, y must be positive