Researchers have found a strong connection between the amount of money a person spends on bookshelves and that person's level of literacy. Therefore, they recommend buying more bookshelves to increase literacy.Why is the researchers' conclusion likely incorrect?
a.Reading books, not buying bookshelves, results in better literacy.
b.The amount of money a person spends on bookshelves is correlated with literacy level.
c.The number of books a person reads is correlated with literacy level.
d.Buying bookshelves, not reading books, results in better literacy.