Which of the following, if true, would illustrate why price indexes such as the UPI might overstate inflation in the cost of going to college? Check all that apply. Professors required each student to buy 10 textbooks, regardless of the price. The quality of content provided by streaming services improved dramatically from 2020 to 2022. Many companies invested heavily in the actors cast for their original series, but this quality change is hard to measure. A natural dietary supplement is developed that is clinically proven to safely boost memory. As the price of textbooks increased, more and more students turned to the used-book market or chose not to buy textbooks at all, instead using the copies on reserve in the library