Kings granted land to lords, who, in turn, granted land to knights under the system called?

Question

Kings granted land to lords, who, in turn, granted land to knights under the system called?
A. Manorialism 
B. The rule of law
C. Charlemagne 
D. Feudalism

It is D right?

Barry Allen aka the flash · Accepted Answer

Yes D :D

MEOW · Answer

i thought it was d but I wanted to be sure