which layer of OSI model used by router?

which layer of OSI model used by router?A. layer 2
B. layer 4
C. layer 3
D. All of above

Routers operate on the third layer of the OSI Model, the Network-Control Layer. Rather than passing packets based on the Media Access Control (MAC) Layer addresses (as bridges do), a router examines the packet’s data structure and determines whether or not to forward it.