Select the correct answer from each drop-down menu. Copies of books made by hand weren't reliable. The (handwriting, language, speed) would vary from one scribe to another. This caused a problem of uniformity. Sometimes the scribes would rephrase a sentence and change the (meaning, style, uniformity) of the text. Knowledge spread slowly because books weren't easily available. However, the invention of the printing press caused an increase in (education, literacy, profits).​