You want to create a composite PK using the first and third fields in the table. How is this done?

(A) Hold down the Shift key and click the first and third fields. Click the Key icon on the toolbar.
(B) Hold down the Ctrl key and click the first and third fields. Click the Key icon on the toolbar
(C) Hold down the Shift key and click the first and third fields. Select Primary Key under the Table
(D) Hold down the Ctrl key and click the first and third fields. Select Primary Key under the Table