You are customizing standard content types for an organization. For the tracking of a department, you must allow users to easily select or enter a value.

In some cases, users may refer to a single department by more than one name. Users must be able to select or type any name for a department but the document must be associated with only one department.
You need to create a column that supports the requirements.
What should you create? http://en.share-gate.com/blog/start-learn-sharepoint-advanced-column-types

A.
a Choice site column that uses a drop-down menu.

B.
a Choice site column that uses check boxes

C.
a Choice listthat uses a drop-down menu

D.
a Managed Metadata site column

Explanation:

References: