What factor contributed to Genghis Khan’s expansion of the Mongol empire?

(1 point)
Responses

He expanded trade routes by building a complex system of canals and waterways.
He expanded trade routes by building a complex system of canals and waterways.

He led a ruthless military into foreign land, using powerful weapons to break down city walls.
He led a ruthless military into foreign land, using powerful weapons to break down city walls.

He established a new social order that led to the creation of a stable government.
He established a new social order that led to the creation of a stable government.

Inventions and innovations during his time of leadership helped industries to grow.

The second option is the correct answer: "He led a ruthless military into foreign land, using powerful weapons to break down city walls." This factor, along with Genghis Khan's military strategy and leadership, played a crucial role in the expansion of the Mongol empire.