If x < y < 0, which of the following must be true? Choose the most appropriate option:
A) x/y is a negative integer
B) xy is a negative integer
C) x+y is a negative integer
D) x-y is a positive integer
E) (-x)+ (-y) is positive integer
Given x, y are less than 0. So both will be negative integers   negative + negative = negative   negative * negative = positive   negative / negative = positive   x-y is false since x&lt;y eg. x=-2, y=-1 then -2-(-1)=-1   So, option (-x)+ (-y) is positive integer is true , because if we multiple negative number with negative it becomes positive(x, y are negative numbers)   Answer : (-x)+ (-y) is positive integer
<result>E</result>
If x < y < 0, which of the following must be true?