Examine the following statement:SQL> ALTER TABLE SALES MODIFY CONSTRAINT pk DISABLE VALIDATE;Which three statements are true?

选择了： The PK index is droppe、The constraint is still enforced for updated rows、The constraint is still enforced for inserted rows.

选择了： The PK index is droppe、The constraint is still enforced for updated rows

选择了： The PK index is droppe、The constraint is still enforced for inserted rows.

选择了： The constraint is still enforced for updated rows、The constraint is still enforced for inserted rows.