Click on the Exhibit button to show an INVOKE of the table CUSTOMER and a partial FILEINFO
of the same table. The SQL statement ‘UPDATE SALES.CUSTOMER SET CREDIT = “A1”
WHERE CUSTNUM IN (21, 3333, 324)’ _______.

A.
updates no rows because the primary key cannot be updated

B.
never updates any rows because CUSTNUM is alphabetic not NUMERIC

C.
updates at most three rows depending on the data content of CUSTOMER

D.
always updates three rows