Refer to the exhibit.

Three calls are active on ephone 1. Assume ephone 2 will remain idle.
How many additional calls can be placed from ephone 1?

A.
0

B.
1

C.
2

D.
3

E.
5

Explanation:
As we can see max-calls-per-button set to 5 and 3 calls are active. So, 2 calls remain.