If x and y are negative integers, which of the following statements must be true?
I. (-x)^y is positive.
II. (-x)^(-y) is positive.
III. x^(-y) is positive.	Options.
A) None  B) II only  C) I and II  D) I and III  E) I, II and III
Let's x = -2 and y = -3   I. (-x)^y = (2)^(-3) = 1/(2^3) --&gt; Positive   II. (-x)^(-y) is positive. = 2^3 --&gt; Positive   III. x^(-y) is positive. = -2^3 --&gt; Negative   Answer: I and II
<result>C</result>
If x and y are negative integers, which of the following statements must be true?
I. (-x)^y is positive.
II. (-x)^(-y) is positive.
III. x^(-y) is positive.