Answer:
A. I have four people to thank: my brother, Tim; my aunt, Lisa; my uncle, Frank; and my best friend, Jon.
Step-by-step explanation:
people to thank: my brother, Tim; my aunt, Lisa; my uncle, Frank; and my best friend, Jon." This is because each person being thanked is separated by a semicolon and all of the names are listed in a clear, concise manner. Option B incorrectly separates the introductory phrase from the list of people being thanked with a comma, and option C does not use semicolons to separate each person and is therefore not grammatically correct.