Respuesta :
Conclusion is defined as a verdict or a decision that you reach upon thorough reasoning.
Here, researchers recommendation was -buying more bookshelves to increase literacy.
But its incorrect, as if one purchases only bookshelves and does not read a single book, then how can he increase his literacy. Rather the correct conclusion can be, that one gets more literate by studying more books.
Hence, option A. Reading books, not buying bookshelves, results in better literacy - is the right answer.
