Which two SQL statements would execute successfully?

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

A.
SELECT MAX(AVG(SYSDATE-inv_date)) FROM invoice;

B.
SELECT AVG(inv_date) FROM invoice;

C.
SELECT AVG(inv_date-SYSDATE),AVG(inv_amt) FROM invoice;

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