The invention of the printing press during the Renaissance significantly transformed the production and accessibility of books. The correct statement about how it changed books is:
It allowed books to be produced more quickly and cheaply.
The printing press enabled mass production of texts, which drastically lowered the cost of books. This made them more accessible to a larger audience and contributed to the spread of literacy and ideas, particularly in everyday languages. It did not make books more expensive, nor did it cause booksellers to reduce the number of available titles; rather, it increased the availability of a diverse range of books.