Narrowing the answers down, I would say that A would probably make the most sense. Frank and Jim are best friends could be true. Jim loving tennis was never inferenced in the passage because he shows no indication of loving tennis. Frank will become a professional tennis player is not guarenteed from what we learn in the passage. Jim will get better at tennis with Franks help is not neccessarily true. It all depends on an individuals will and determination, skill and health to become good at a physical sport. So in short, A would be my answer. Tell me what you get!
-TTL