Among the Cultural and Commercial Changes Brought by the Crusades

Among the cultural and commercial changes brought by the Crusades was

A) the introduction of Europeans to a wide range of new foods and luxury items, including silks and brocades, perfumes and soaps.
B) Italian traders sought to establish direct trade with the whole of the Muslim world.
C) Salah ed-Din encouraged trade, and various treaties between the Muslim states and the Crusaders ensured free passage of goods.
D) all of these choices
E) none of these choices