Hi,
In this case, the correct answer is B.
Explaining this:
A answer: Can not be, cause there is no "or" in this syntax.
C answer: So close, but the separator is ;
😧 need to have any separator between tags, could be correct if you use "+AA;+BB"
Answering your question, yes, you can place +, but is necessary to separate all with the semi colon character. By default, if you don't put +, it will include it.
Hope this helps you!
Good luck with the exam!!
See you in the Community, bye 🙂
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Pablo Sarabia
Solution Manager & Architect
Altamira Assets Management
Madrid
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