Which factor increased trade under the mongol rule? important mathematical discoveries that contributed to technology the good relationship between the chinese people and the mongols the invention of new weapons that made sieges of cities easier construction and protection of roads that ensured safe and easy travel the tolerant attitude of the mongols toward all religions

The correct answer is the fourth statement. The factor that increased trade under Mongol rule is construction and protection of roads that ensured safe and easy travel. Mongols guaranteed safe passage for traders, missionaries, and travelers (for example Marco Polo) and the trade flourished causing the Mongols to gain incredible wealth taxing the trade. 

the answer is d. give brainliest if right.

ps is this 7th grade civics?