Question

One important impact of the Mongol expansion

across Asia and Europe was the
(1) increased authority of the Kievan princes
(2) rise in trade along the Silk Roads
(3) introduction of Hinduism into Chinese
culture
(4) maritime exploration of the Arabian seacoast

Answer 1

Also since the mongols controlled the vast majority of the Silk Road the security of it was phenominal, futher encouraging trade

Answer 2

(2) I believe it was rise in trade along the silk roads. Although the silk road was used, during the Tang Dynasty the use of it slowly and slowly decayed. However, the Mongol Expansion into China rejuvenated the Silk Road.