Which of the following, if true, would illustrate why price indexes such as the cspi might overstate inflation in the cost of going to college? check all that apply.
a. professors required each student to buy 10 textbooks, regardless of the price.
b. a new, safe method of memory enhancement became available for purchase.
c. the quality and design of calculators improved dramatically from 2010 to 2012. for example, calculators made in 2012 accept memory cards, whereas those made in 2010 do not.
d. a large percentage of students now buy their textbooks online, while the cspi uses data from university book stores that increase the prices of textbooks by a larger percentage per year than online retailers.
e. 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.