If x/y = 5/3, then (x + y)/(x - y) = ?	Choose the correct option
A) 4  B) 1 / 5  C) - 1 / 6  D) - 1 / 5  E) - 5

Rationale: "any x and y satisfying x / y = 5 / 3 should give the same value for ( x + y ) / ( x - y ) . say x = 5 and y = 3 , then ( x + y ) / ( x - y ) = ( 5 + 3 ) / ( 5 - 3 ) = 4 . answer : a ."
Answer: A