Which file would you run to set the Oracle Applications environment?

You have to patch an Oracle Applications environment configured on a UNIX node. To start an
AutoPatch session, you log in to the application-tier server node as the applications file system
owner. You enter adpatch at the command prompt and get the following error: “-bash: adpatch:
command not found” On closer observation, you find that the applications environment is not set.
Which file would you run to set the Oracle Applications environment?

A.
$APPL_TOP/APPS<context_name>.env

B.
$APPL_TOP/APPS_<context_name>.env

C.
$APPL_TOP/admin/APPS<context_name>.env

D.
$APPL_TOP/admin/APPS_<context_name>.env