Which is the valid DELETE statement?

View the Exhibit and examine the description for the PRODUCTS and SALES table.
PROD_ID is a primary key in the PRODUCTS table and foreign key in the SALES table.
You want to remove all the rows from the PRODUCTS table for which no sale was done for
the last three years. Which is the valid DELETE statement?

A.
DELETE FROM products WHERE prod_id = (SELECT prod_id FROM sales WHERE
SYSDATE >= time_id – 3*365 );

B.
DELETE FROM products WHERE prod_id IN (SELECT prod_id FROM sales WHERE
SYSDATE – 3*365 >= time_id);

C.
DELETE FROM products WHERE prod_id IN (SELECT prod_id FROM sales WHERE
time_id >= SYSDATE – 3*365 );

D.
DELETE FROM products WHERE prod_id = (SELECT prod_id FROM sales WHERE
time_id – 3*365 = SYSDATE );

Explanation: