Mark the statement if it accurately describes a result of the invention of the printing press a. books became less expensive to purchase. b. books became available to many people throughout europe. c. the literacy rate began to rise as interest in learning grew. d. the demand for books became a problem because only a few printers were available.

I would also have to say A, B, and C.

Commentary on A: Prior to the printing press, there weren't many copies of books so that would make them expensive.

Commentary on B: Illiteracy was very common in the era that you are studying. Only the wealthy or the religious leaders knew how to read. 

Commentary on C: Once people had book and were taught to read they were able to think on their own and not have to believe everything they were told, which meant that religious leaders and possibly some wealthy people lost some power because they commoners knew how to read and it made it harder for the leaders and the wealthy people to take advantage of them.

Hopefully this helps.  

explanati“there were many such dangers, in which the odds were all against them. their children were not as well as they had been at home; but how could they know that there was no sewer to their house, and that the drainage of fifteen years was in a cesspool under it? how could they know that the pale-blue milk that they bought around the corner was watered, and doctored with formaldehyde besides? when the children were not well at home, teta elzbieta would gather herbs and cure them; now she was obliged to go to the drugstore and buy extracts–and how was she to know that they were all adulterated? how could they find out that their tea and coffee, their sugar and flour, had been doctored; that their canned peas had been colored with copper salts, and their fruit jams with aniline dyes? and even if they had known it, what good would it have done them, since there was no place within miles of them where any other sort was to be had? the bitter winter was coming, and they had to save money to get more clothing and bedding; but it would not matter in the least how much they saved, they could not get anything to keep them warm. all the clothing that was to be had in the stores was made of cotton and shoddy, which is made by tearing old clothes to pieces and weaving the fiber again. if they paid higher prices, they might get frills and fanciness, or be cheated; but genuine quality they could not obtain for love nor moneyon: