Which of the following enables the user to connect to the HADR standby database and execute select
statements?

A.
DB2_HADR_ROS

B.
HADR_SPOOL_LIMIT

C.
DB2_HADR_SOSNDBUF

D.
DB2_HADR_PEER_WAIT_LIMIT

Explanation:
https://www.ibm.com/developerworks/data/library/techarticle/dm-1205hadrstandby/