What personal pronoun correctly completes the sentence The funniest performers were Karl Mike and .?

The correct personal pronoun to complete the sentence is I.

Here's why:

* Subject Pronoun: The sentence is talking about the "funniest performers," and the pronoun needs to be a subject pronoun.

* First Person: "I" is the first-person singular subject pronoun, used when referring to yourself.

So the complete sentence is: "The funniest performers were Karl, Mike, and I."