​Structure of the ORDERITEMS Table

Multiple Choice

​Structure of the ORDERITEMS table

-If a PRIMARY KEY constraint,named ORDERITEMS_PK,for the ORDER# and ITEM# columns of the ORDERITEMS table have been disabled,which of the following commands will enable the constraint?​

A) ALTER TABLE orderitems
ENABLE PRIMARY KEY CONSTRAINT;
B) ALTER TABLE orderitems
ENABLE CONSTRAINT orderitems_pk;
C) ALTER TABLE orderitems
MODIFY PRIMARY KEY CONSTRAINT;
D) ​ALTER TABLE orderitems
MODIFY PRIMARY KEY CONSTRAINT ENABLE;