Waiter Evan needs to serve entrees (fried eggs, hamburger, cheeseburger, vegetable burger, soup, ham sandwich) to customers in chairs 1-6. Rules: Non-sandwiches at 3 & 4; Cheeseburger and hamburger not adjacent; Chair 5 won't sit next to ham eaters; Vegetable burger between fried eggs and cheeseburger, not chair 2; Hamburger not next to soup.
Question: To which customer should Evan serve the soup?
Options:
A. chair 1
B. chair 2
C. chair 3
D. chair 4
E. chair 5
Answer: C