The most important findings from the Hawthorne Studies were

The most important findings from the Hawthorne Studies were that: Employees perform better when paid higher than industry standards Employees perform better when working in soft light Employees perform better when they are provided regular feedback Employees perform better when managers treat them in a more positive manner.

Solution

Answer is d

The Hawthorne studies found that workers were more responsive to group involvement and managerial attention than to financial incentives.

Hence, if the managers treat them in a more positive manner then employees performance automatically improves.

As per his studies, light intensity has no impact on the output.