Respuesta :
id say the correct answer would be
B) A company that makes pain relief medication tests the effectiveness of their own medicine compared to that of three other brands
Answer: B. A company that makes pain relief medication tests the effectiveness of their own medicine compared to that of three other brands.
Explanation:
An experimental bias can be define as a phenomena in which the experimenter chooses subjects which are likely to generate a desire result, instead of normal processes of science. B. A company that makes pain relief medication tests the effectiveness of their own medicine compared to that of three other brands. is the correct option because in this the company will only test the own brand to know the effectiveness of their own product so that changes can be made in it's composition.