Which two SQL statements would executes successfully?

See the Exhibit and examine the structure and data in the INVOICE table:
Which two SQL statements would executes successfully? (Choose two.)
Exhibit:

A.
SELECT MAX(inv_date),MIN(cust_id) FROM invoice;

B.
SELECT MAX(AVG(SYSDATE – inv_date)) FROM invoice;

C.
SELECT (AVG(inv_date) FROM invoice;

D.
SELECT AVG(inv_date – SYSDATE),AVG(inv_amt) FROM invoice;