Identify the Statement Below That Is False with Regards to Basic

Multiple Choice

Identify the statement below that is false with regards to basic requirements of a relational database model.

A) Primary keys can be null.
B) Foreign keys,if not null,must have values that correspond to the value of a primary key in another table.
C) All non-key attributes in a table should describe a characteristic about the object identified by the primary key.
D) Every column in a row must be single-valued.