All of the following are examples of long-term impacts of the Mongolian invasions except: Group of answer choices
a. The Mongols revolutionized warfare through the invention of the first handheld guns, which spread across trade routes which they controlled.
b. Mongol military tactics forced the Europeans to abandon knight warfare and adapt a quicker, lighter strategy.
c. The Mongols revived inter-Asian trade through a system of roads and routes that spanned thousands of miles.
d. Bubonic plague spread wildly across the lands controlled by the Mongols, and eventually into Europe.