Which three edit options for the STUDENTS table are valid?

Exhibit:
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Which three edit options for the STUDENTS table are valid? (Choose three.)

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Which three edit options for the STUDENTS table are valid? (Choose three.)

A.
Adding a new column

B.
Removing the Not Null constraint on the STUDENT_ID column

C.
Enforcing the primary key constraint on the COURSE_ID column

D.
Removing the Not Null constraint on the STUDENT_NAME column

E.
Enforcing the Not Null constraint on the DATE_OF_BIRTH column



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