You need to complete the mapping of the Team Type column

You are using the Knowledge Discovery feature of the Data Quality Services (DQS) client application tomodify
an existing knowledge base. In the mapping configuration, two of the three columns are mapped to existing
domains in the knowledge base. The third column, named Team Type, does not yet have a domain. You need
to complete the mapping of the Team Type column. What should you do?

A.
Add a column mapping for the Team Type column.

B.
Add a domain for the Team Type column.

C.
Map a composite domain to the source column.

D.
Create a composite domain that includes the Team Type column.

Explanation:
According to these references, this answer looks correct.
References:
http://msdn.microsoft.com/en-us/library/ff877917.aspx
http://msdn.microsoft.com/en-us/library/hh213015.aspx
http://msdn.microsoft.com/en-us/library/gg524799.aspx