Which two statements are true regarding the usage of integrity constraints? (Choose two.)
A.
l EM h column can have only one constraint.
B.
Primary key constrain) can consist of multiple columns from the same table.
C.
Foreign key column can reference e a primary key column in the same of or different tables.
D.
More than one row in a table cannot contain null value In a column with unique constraint.
E.
A chock constraint can enforce conditions that refer to the values in other columns in the table.
Explanation: