Mansabdari System was introduced by

Explanation:
Mansabdar is the holder of a rank or an officer in the army. The Mansabdari system originated first in the Central Asian region.
It was introduced by Mughal emperor Akbar in 1571AD. The word Mansab came from Arabic which means rank or position.

Final Answer:
Hence, the correct answer is option A. i.e., Akbar. He introduced the Mansabdari System.