The sentences that correctly use commas are:
- Every fourth Friday, my mom drives to Spokane, Washington, to visit her best friend.
- I don't know what you want to make, but I'm sure I have chocolate bars, marshmallows, and graham crackers.
(Note: The first sentence had a slight error where a comma was missing before "to visit her best friend," which should be present after "Washington." The corrected version would be: "Every fourth Friday, my mom drives to Spokane, Washington, to visit her best friend.")