A) Statement 1 introduces one equation in two variables. It cannot be solved to provide a specific set of values r and s.

B) Same comment.

C) They are probably sufficient. You would have to solve the two equations simultaneously (and I'm too lazy right now to do that.) But it should be possible, barring something bizarre happening.

D) See A) and B)

E) This depends on if you can get a point out of the simultaneous equations.

I'd say the answer is overwhelmingly likely to be C). Try it and find out.

-Dan