What is the relationship between a call leg and a dial peer?

What is the relationship between a call leg and a dial peer?

A.
A call leg is a virtual connection to set up a call whereas a dial peer is a physical connection to
complete an end-to-end call.

B.
The call leg and the dial peers are both logical connections used to complete an end-to-end
call.

C.
A call leg is a virtual connection that is set up and torn down before the dial peer is established.

D.
The call leg and the dial peer are both physical connections used to complete an end-to-end
call.