Punctuation question, 8th grade

Then Hitler came up with his "Final Solution" the Holocaust.

This sentence feels as if it needs something between "Final Solution," and the Holocaust, but I know it isn't a comma. Would it be a : or ;? If it is a comma, and I'm wrong, just let me know. I'm in 8th grade and I am working on a Holocaust project, so any help is appreciated.

In a comment,RegDwigнt wrote:

The comma is perfect and neutral, matter-of-fact. The semicolon makes for a greater pause and effect; picture a short drumroll and decide for yourself if it's out of place given the context. The semicolon does not work at all. (The rule for using semicolons is simple: if you are not sure whether it works, then it does not.)