When Melinda tells David that she recieved a D on her suffragette report what advice does he give her?

From the text:

David: "But you got it wrong. The suffragettes were all about speaking up, screaming for their rights. You can't speak up for your right to be silent. That's letting the bad guys win. If the suffragettes did that, women wouldn't be able to vote yet."

I blow a bubble in his face. He folds the gum wrappers into tiny triangles.

David: "Don't get me wrong. I think what you did was kind of cool and getting stuck in MISS wasn't fair. But don't expect to make a difference unless you speak up for yourself."