Lance is afraid that, even though he is innocent, he will make a bad impression upon the jury. Must Lance speak at the trial?

No

Explanation:

By the Fifth Amendment of the Constitution, no one can be made to witness against themselves. This is the so-called right to remain silent and it means that defendant can’t be forced to speak if he or she does not want to.

While it is probably better for Lance to speak at the trial and defend himself, he doesn’t have to. His lawyers will likely try to make him understand the benefits of the defense for him. Yet, no one can make him stand on trial if he chooses not to at the end.