To create a tag, the user must have the tag capability associated with their user role. The tag capability allows the user to create, edit, and delete tags. The user does not need to identify a field:value pair, have the Power role, or be able to edit the sourcetype the tag applies to.ReferencesSee Define and manage tags in Settings and
[About capabilities] in the Splunk Documentation.

Reference: https://docs.splunk.com/Documentation/SplunkCloud/8.0.2003/Search/Usethesearchcommand The search command is used to filter or refine your search results based on a search string that matches the events2. The search command behaves exactly like search strings before the first pipe, which means that you can use the same syntax and operators as you would use in the initial part of your search2. Therefore, option D is correct, while options A, B and C are incorrect because they are not true statements about the search command.

In Splunk, a variable for a macro is defined by placing the variable name inside dollar signs, like this:
$variable name$. This syntax allows the macro to dynamically replace the variable with the appropriate value when the macro is invoked within a search. Using this method ensures that the search strings can be dynamically adjusted based on the variable's value at runtime.
References:
* Splunk Docs: Use macros
* Splunk Answers: Defining and Using Macros

In Splunk, the order of operations for Boolean logic in the where command follows this sequence:
Parentheses: Operations inside parentheses are evaluated first.
NOT: The NOT operator is evaluated after parentheses.
AND: The AND operator is evaluated next.
OR: Finally, the OR operator is evaluated last.
This order ensures that expressions within parentheses are given priority, followed by negations (NOT), conjunctions (AND), and finally disjunctions (OR).
References:
Splunk Docs - where command