What is the meaning of carrier sense in the CSMA/CD algorithm?

A.
The host will only transmit when it receives the token.

B.
The host will retransmit the frame if it detects a collision during transmission.

C.
The host is able to detect the transmission speed of the Ethernet switch port to which the
host is connected.

D.
The host will only transmit data when it detects that no other devices are transmitting.

E.
The host will only transmit upon a timer expiry.

Explanation: