The CUSTOMERS table has these columns: The CUSTOMER_ID column is the primary key for the table.Which two statements find the number of customers? （）

A.SELECT TOTAL(*)   FROM customers;

B.SELECT COUNT(*)   FROM customers;

C.SELECT TOTAL(customer_id)   FROM customers;

D.SELECT COUNT(customer_id)   FROM customers;

E.SELECT COUNT(customers)   FROM customers;

F.SELECT TOTAL(customer_name)   FROM customers;