Identify the reason for the SQL statement failure?

Evaluate the following SQL commands:

The command to create a table fails. Identify the reason for the SQL statement failure?
(Choose all that apply.)

A.
You cannot use SYSDATE in the condition of a CHECK constraint.

B.
You cannot use the BETWEEN clause in the condition of a CHECK constraint.

C.
You cannot use the NEXTVAL sequence value as a DEFAULT value for a column.

D.
You cannot use ORD_NO and ITEM_NO columns as a composite primary key because ORD
NO is also the FOREIGN KEY.

Explanation:
CHECK Constraint
The CHECK constraint defines a condition that each row must satisfy. The condition can use the
same constructs as the query conditions, with the following exceptions:
References to the CURRVAL, NEXTVAL, LEVEL, and ROWNUM pseudocolumns
Calls to SYSDATE, UID, USER, and USERENV functions
Queries that refer to other values in other rows

A single column can have multiple CHECK constraints that refer to the column in its definition.
There is no limit to the number of CHECK constraints that you can define on a column.
CHECK constraints can be defined at the column level or table level.
CREATE TABLE employees
(…
salary NUMBER(8,2) CONSTRAINT emp_salary_min
CHECK (salary > 0),