Answer:
Option B. The ruler who increased trade on the Silk Road more than ever before was Kublai Khan.
Step-by-step explanation:
Kublai Khan was the founder of the Yuan dynasty during the 13th century in China and he was also the first Mongol to rule over the country. He was the first leader in the country to appoint foreigners, such as Marco Polo, to important official positions.
Under his leadership, the Mongol Empire linked Europe and Asia and he made sure that his government was hospitable to foreign travelers in order to maintain positive trade relations on the Silk Road. All of these actions made the ruler increase trade on the Silk Road more than ever before in history.