Why was RouterA not elected as the designated router?

Refer to the exhibit:

Why was RouterA not elected as the designated router?

A.
The OSPF process ID of RouterA is lower than the process ID of the elected DR.

B.
RouterA has a lower OSPF priority value than the router elected as DR.

C.
The interface address of RouterA is a higher value than the interface address of the DR

D.
RouterA is not advertising the interface with address 221.130.149.10.

Explanation:
The routeA advertised can be known from the output of ‘show ip protocols’ provided in the exhibit

190.171.23.0 0.0.0.255 area 0
190.171.32.0 0.0.0.255 area 0

Not advertising the interface of 221.130.149.10.
In broadcast multi-access networks, the routers perform DR and BDR election, more often thannot, after being enabled, the routers on the Ethernet will use Hello protocol to select DR and BDR,and the rest routers will attempt to establish neighbor relationships with DR and BDR. If aninterface is not advertised, it will not participate in the election.