Which two queries would achieve the required result?

You need to generate a list of all customer last names with their credit limits from the CUSTOMERS
table. Those customers who do not have a credit limit should appear last in the list.
Which two queries would achieve the required result? (Choose two.)

A.
SELECT cust_last_name, cust_credit_limit
FROM customers
ORDER BY cust_credit_limit DESC ;

B.
SELECT cust_last_name, cust_credit_limit
FROM customers
ORDER BY cust_credit_limit;

C.
SELECT cust_last_name, cust_credit_limit
FROM customers
ORDER BY cust_credit_limit NULLS LAST;

D.
SELECT cust_last_name, cust_credit_limit
FROM customers
ORDER BY cust_last_name, cust_credit_limit NULLS LAST;