Which of the following commands drops any columns marked as unused from the SECUSTOMERORDERS table? a. DROP COLUMN FROM secustomerorders WHERE column_status = UNUSED; b. ALTER TABLE secustomerorders...

Which of the following commands drops any columns marked as unused from the

SECUSTOMERORDERS table?

a. DROP COLUMN FROM secustomerorders WHERE column_status = UNUSED;

b. ALTER TABLE secustomerorders DROP UNUSED COLUMNS;

c. ALTER TABLE secustomerorders DROP (unused);

d. DROP UNUSED COLUMNS;