which is the highest transmission speed for a CAT5 network cable?

CAT 5 cable is a twisted pair (4 pairs) high signal integrity cable type. In a main distribution frame
(MDF), which is the highest transmission speed for a CAT5 network cable?

A.
1Mbps.

B.
10Mbps.

C.
100Mbps.

D.
1000Mbps.