Which of the following searches would return events with failure in index netfw or warn or critical in index netops?

Which of the following searches would return events with failure in index netfw or warn or critical in index netops?
A . (index=netfw failure) AND index=netops warn OR critical
B . (index=netfw failure) OR (index=netops (warn OR critical))
C . (index=netfw failure) AND (index=netops (warn OR critical))
D . (index=netfw failure) OR index=netops OR (warn OR critical)

View Answer

Answer: B

Explanation:

Reference: https://docs.splunk.com/Documentation/Splunk/7.2.6/Search/Aboutsubsearches