middleschooler05 middleschooler05 Today at 8:02 AM History Answered PLEASE HELP! Which of the following led to the Mongols conquering China under Genghis Khan? Choose 2 responses. Genghis Khan's army was larger than China's. The Mongols used a deadly new weapon called a trebuchet. The Mongols put Chinese cities under siege. China's military leaders made huge mistakes in battle.