When is a PRIMARY KEY (PK) table constraint evaluated during an INSERT statement into the table?

When is a PRIMARY KEY (PK) table constraint evaluated during an INSERT statement into the table?
A . The PK constraint is never checked when a row is inserted into the table.
B . After the row is inserted into the table.
C . Before the row is inserted into the table.
D . The PK constraint is only checked during a GENERATE STATISTICS operation.

View Answer

Answer: C