A fully meets rating can be assigned for which type of query according to the guidelines?

The correct choice indicates that a fully meets rating can be assigned to know simple queries even if they don’t display the answer. This is because a know simple query is designed to seek straightforward and specific information. As long as the content provided by the search results meets the intent and provides relevant information that effectively answers the query, it can still receive a fully meets rating, even if the answer isn't directly displayed.

In evaluating queries, the main focus is on whether the provided results fulfill the information need expressed in the query. For simple queries, the expected outcome is clear and well-defined, allowing for a match even in circumstances where an explicit answer isn't presented upfront. This reflects a deeper understanding of effective information retrieval rather than solely relying on the presence of direct answers in displayed results.

The other options likely involve criteria that either do not align with the requirements for a fully meets rating or limit the scope in a way that does not encompass the broader applicability of know simple queries to achieve comprehensive matches with user intent.