(A) very few / some
The report concludes that very few learners have some knowledge of astrophysics.
This is a logical deduction question. A report typically highlights a concern — here, that only a small number of learners possess partial knowledge. Option A ("very few / some") is the only pair that creates a meaningful, realistic conclusion. The other options are logically inconsistent (e.g., "no learners have a lot of knowledge" or "every learner has no knowledge" are contradictory or irrelevant to a research report's typical findings).