A. The blacklist takes precedence over the whitelist.
B. The whitelist takes precedence over the blacklist.
C. Wildcards are not supported in any client filters.
D. Machine type filters are applied before the whitelist and blacklist.
Explanation:
https://docs.splunk.com/Documentation/Splunk/8.2.1/Updating/Filterclients
Reference: https://community.splunk.com/t5/Getting-Data-In/Can-I-use-both-the-whitelist-AND-blacklist-forthe-same/td-p/390910