Hi @Emmanuel_Bernard1, welcome to the community.
Please note that the Quiz asks you to:
Which is the most succinct query to return all documents from …
said clearly or
Hence from all the queries mentioned in the options, the correct one is the most succinct (by leveraging the power of
explicit $and can be used here as one of the options but it is straightforward as compared to
implicit $and, the lecture was there to provide you an understanding of how you can use
explicit $and when needed.
In case you have any doubts, please feel free to reach out to us.
Thanks and Regards.
Curriculum Services Engineer