If x is negative and y is positive, which of the following cannot be positive?
Choose the correct choice from the following answers:  A) -xy  B) x^2/y  C) x^4/y  D) -x^3*y  E) -x/-y
- * - = +   + / - = -   -x/-y is negative.   Answer : -x/-y
<result>E</result>
If x is negative and y is positive, which of the following cannot be positive?