This file has been manually created on a universal forwarder:

/opt/splunkforwarder/etc/apps/my_TA/local/inputs.conf
[monitor:///var/log/messages]
sourcetype=syslog
index=syslog

A new Splunk admin comes in and connects the universal forwarders to a deployment server and deploys the same app with a new inputs.conf file:

/opt/splunk/etc/deployment-apps/my_TA/local/inputs.conf
[monitor:///var/log/maillog]
sourcetype=maillog
index=syslog

Which file is now monitored?

A. /var/log/messages

B. /var/log/maillog
C. /var/log/maillog and /var/log/messages
D. none of the above

Reference:
https://docs.splunk.com/Documentation/Splunk/7.3.1/Updating/Exampleaddaninputtoforwarders