What happens on a network link where one device is capable of $10$ Mbps and the other is capable of $100$ Mbps$?$

Question $39$ options:

a$)$

Both devices must use $100$ Mbps; if one device is capable of only $10$ Mbps$,$ the link cannot be established.

b$)$

Both devices must be administratively set to use $10$ Mbps or the link cannot be established.

c$)$

The devices can negotiate between each other to determine the fastest speed to use on the link.

d$)$

Because the devices use different speeds, a link cannot be established between the devices