The concept of "joining" a system is best described by which of the following statements?

A) The counselor verbally expresses empathy toward the client.
B) The client accommodates the counselor's position.
C) The client projects onto the counselor.
D) The counselor accommodates to the client.

Joining a system refers to the counselor's ability to accommodate to the client's perspective, values, and communication style to establish a collaborative and respectful relationship. This involves effort from the counselor to create a bond and understanding between both parties, and it is not about projecting, accommodating or empathizing with clients.