As part of a forensic investigation, you collected the ARP table of some systems, containing MAC addresses and their corresponding IP addresses.

What layer of the OSI model these addresses operate at$?$

a$.$ MAC address at layer $1$ and IP address at layer $3$

b$.$ IP address at layer $2$ and MAC address at layer $3$

c$.$ Both MAC address and IP address at layer $2$

d$.$ MAC address at layer $2$ and IP address at layer $3$

e$.$ Both MAC address and IP address at layer $3$