Bruce claims that for any two integers r and s, the location of r + s is to the right of r on the number line.
Which statement best classifies Bruce's claim?
A. Bruce's claim is never true for two integers r and s.
B. Bruce's claim is true only when s is a positive integer.
C. Bruce's claim is true only when r is a positive integer.
D. Bruce's claim is always true for any two integers r and s.