"Concurrent condition" and "secondary condition" have the same meaning.

Some vendors may use the bait-and-switch tactic, which means ____. 

A. the price of the desired item is lowered but "sold out" and a lower-quality substitute is sent B. the price of the desired item is higher than the initial quote C. the vendor tells the customer why the desired item is not the best buy D. the price of the desired item is lowered but "sold out" and the customer is encouraged to buy a more expensive item E. the vendor agrees to trade out your current office equipment for new equipment

A(n) _______________ is an electronic device that measures hearing acuity by producing sounds in specific frequencies and intensities.

Fill in the blank(s) with the appropriate word(s).