What is the effect of the first crusade

Effects of the Crusades on Commerce  

One of the most important effects of the crusades was on commerce. They created a constant demand for the transportation of men and supplies, encouraged ship-building, and extended the market for eastern wares in Europe. The products of Damascus, Mosul, Alexandria, Cairo, and other great cities were carried across the Mediterranean to the Italian seaports, whence they found their way into all European lands. The elegance of the Orient, with its silks, tapestries, precious stones, perfumes, spices, pearls, and ivory, was so enchanting that an enthusiastic crusader called it "the vestibule of Paradise."

answer; (a) he was a u.s senator for 38 years;