How do you know when to tip?

In many areas of the world, tipping is an essential part of paying the bill at a restaurant or pub. Servers in countries such as Canada, the Caribbean, and Morocco generally expect customers to add a gratuity of 10 to 20 percent to their bill, and not tipping in these regions would be considered rude. In some countries, however, the opposite is true; can you guess in which country tipping is actually considered rude?

A. Saudi Arabia
B. Mexico
C. Japan
D. South Africa

Click here for the answer!