As a production engineer for a large chemical company, you need to find a new supplier for a specific commodity. Since this contract is substantial, the salespeople with whom you meet are naturally trying to influence your purchasing decision. Which of the following items are ethical in your opinion?

a. Your meeting with a salesperson extends over lunch, and he or she pays for the lunch.

b. In casual conversation at the sales meeting you express an interest in baseball. After the meeting, a salesperson sends you free tickets to your favorite team’s game.

c. After your meeting, a salesperson sends a case of wine to your home with a note thanking you for the “useful” meeting.

d. As a result of the sales meeting, you are invited on an all-expense-paid trip to China to visit the salesperson’s manufacturing facility.

Give your solution in Engineering Ethics Matrix form.