Answer:
C. Gunpowder
Explanation:
"The Ottomans readily accepted new military technologies such as gunpowder and firearms because they increased the net revenue available to the ruler and reduced the expected value of revolting against him." [https://opencommons.uconn.edu/cgi/viewcontent.cgi%3Farticle%3D1256%26context%3Decon_wpapers%23:~:text%3DThe%2520Ottomans%2520readily%2520ac%252D%2520cepted,value%2520of%2520revolting%2520against%2520him.&ved=2ahUKEwiLycSBmJTuAhUPQq0KHWw8CTEQFjABegQIAhAF&usg=AOvVaw0atnvo9TNmWKtu_LvG5-TMM]
