Obama also chided McCain for another new commercial that promises " change that we need . " " Sound familiar ? " said Obama , who has made " change " the central theme of his campaign . " Let me tell you , instead of borrowing my lines he needs to borrow some of my ideas . Change is n't about slogans . It 's about substance . " He also took a little poke at McCain 's running mate , Gov.
Why would Obama be talking about McCain like that ?
Pick the best answer from the following options:
A. None of the above choices .
B. Obama wants to memorialize McCain after his death .
C. They are political rivals .
D. Obama is commending the usages of slogans .


C