Have you seen the film "desperate housewives",___leading act

Have you seen the film "desperate housewives",___leading actors are four famous actresses in America?
A.its B.it's c.whose D.which
last weekend I bought a nice dress,____was very reasonable
A.which price B.the price of which
C.its price D.the price of whose
Do you still remeber the chicken farm___ we visited three months ago?
A.where B.when C.that D.what
we are living in an age___ most things are done on computer
A.which B.that C.whose D.when