<span>c. proves our expertise </span>
The researchers found that the productivity of the more highly illuminated workers increased much more than that of the control group. They also found out that their productivity even improved when the lights were dimmed again. As a result, the researchers<span> concluded that it was not the changes in physical conditions that were affecting the workers' productivity. Rather, it was the fact that someone was actually concerned about their workplace.</span>
The bays are excellent for shipping, shipbuilding, and fishing
