Youreceivedtheseerrormessagesbecausetheclientcannotfindthedesireddatabase:ORA-12198:TNS:co

Youreceivedtheseerrormessagesbecausetheclientcannotfindthedesireddatabase：ORA-12198：TNS：couldnotpathtodestinationORA-12203：TNS：unabletoconnecttodestinationWhichactionwouldbeappropriateinhelpingtoresolvetheerrors？（）

A.A

B.B

C.C