Answer: I would say C, but A is also possible.
Explanation:
The cartoon was published by Franklin Leslie in 1882, about the Chinese Exclusion Act. You can see "but no admittance to chinamen" on the sign, which is racist, but is more related to immigration.
The correct answer would be letter C.
It was the Mamluks. A Mamluk was a soldier who converted to Islam, and over the time that the military used, they became stronger and more powerful military. This was the only way and the only war that the Mongols lost.