Answer:
Answer is C, Triplett
Explanation:
Triplett was a renowned psychologist that was born in 1861.
he developed a study that confirmed or established the fact that works that are done with other people, whether in pairs or groups, are completed faster than those that were done alone or individually.
In this case, the workers in the factory where Blaine works proved the fact that was established by Triplett, because they were able to produce more stereo when working in groups than individually.
