Final answer:
The meeting must include the following people: Mark, Jay, Chris, and Rulon.
Step-by-step explanation:
The sentence that is punctuated correctly is: The meeting must include the following people: Mark, Jay, Chris, and Rulon. This sentence correctly uses a colon to introduce a list of people, with the list immediately following the colon. The other sentence incorrectly places the colon after the word 'include' instead of after 'people'.
Learn more about Punctuation in English sentences