What is the cause of this error?
A. The user name and password the application is using are incorrect.
B. The security group assigned to the application servers does not have the necessary rules to allow inbound connections from the DB instance.
C. The security group assigned to the DB instance does not have the necessary rules to allow inbound connections from the application servers.
D. The user name and password are correct, but the user is not authorized to use the DB instance.
Answer:C
What is the cause of this error?
A. The user name and password the application is using are incorrect. B. The security group assigned to the application servers does not have the necessary rules to allow inbound connections from the DB instance. C. The security group assigned to the DB instance does not have the necessary rules to allow inbound connections from the application servers. D. The user name and password are correct, but the user is not authorized to use the DB instance.