What Kind of Individual License Does an Employee Need to Have

What kind of individual license does an employee need to have in order to legally serve alcohol?

A) All bartenders must be licensed with the state, but servers only need their employer's approval.
B) There is no such thing as a national "bartending license" or an individual alcohol service license for servers, but certain states may require certification or a "license to pour."
C) Bartenders must go to bartending school and pass a high-grade state licensing test, while other employees can apply directly to the state for a low-grade alcohol service license.
D) Both bartenders and servers need to apply for a license with the local liquor authority, and this license expires after 14 months.