Refer to the exhibit.
While configuring dial plan on a system, an engineer notices the route list in the pictured state.
What will cause this?
| A. |
One subscriber server in CUCM Group is down. | |
| B. |
Media Resource on the CUCM are oversubscribed. | |
| C. |
"Run on all active unified CM nodes" is not checked on the route list. | |
| D. |
"No route group" is added in this Route List. |