Researchers in Pegasus Electronics found that a fifth of all sick leave in the company was stress-related. Very high work demands led to stress, but boring jobs were equally detrimental. The Board of Directors therefore decided to take corrective action by getting supervisors to re-organise the production lines so that all their employees had greater control over the rate of production. In addition, all supervisors are now being trained to recognise the early signs of stress-related problems and there is a possibility that if this training proves successful, remaining staff may follow suit shortly.

Question: The action taken has been shown to reduce stress-related sick leave.
Options:
A. true, B. false, C. uncertain
Answer: "C"