This question is based on successful execution of the following command:

CREATE VIEW changename

AS SELECT customer#, lastname, firstname

FROM customers

WITH CHECK OPTION;

Assume that the only constraint on the CUSTOMERS table is a PRIMARY KEY constraint.

Which of the following columns serves as the primary key for the CHANGENAME view?

a. Customer#

b. Lastname

c. Firstname

d. The view doesn’t have or need a primary key.