Which three commands execute successfully on PRODUCTS?

Examine this description of the PRODUCTS table:

Rows exist in this table with data in all the columns. You put the PRODUCTS table in read-only mode.
Which three commands execute successfully on PRODUCTS?
A. DROP TABLE products;
B. ALTER TABLE products DROP COLUMN expiry_date;
C. ALTER TABLE products SET UNUSED (expiry_date);
D. ALTER TABLE products DROP UNUSED COLUMNS;
E. CREATE INDEX price_idx ON products (price);
F. TRUNCATE TABLE products;

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