Consider the following relations amouse schema for Car Renting company (allow yota): Customer (cno, cname, city, phone, job, salary) Car (reg.no, model, maker, year) Rent (cno, reg.no, rented-date, date-returned, cost) Choose the correct relational Algebra expression that answers the following queries: Display car reg-no for cars that are currently rented but not yet returned. ( .( ) O Aliceg-n. Id-ag-no-xuzz (Customer n car)) o B 1.eg-no (Csate-returned=NUL: (Rent)) O C. Deg-ne (Czeg-n.c=srul: (Rent)) OD. 1-..-.. (date-returned > zentes-dase (Rent)