When measuring workers' sentiment about a strike, the most relevant measure is:
C The amount of working time lost.
This measure reflects the impact of the strike on the productivity and operations of the companies involved. When workers go on strike and working time is lost, it indicates the seriousness of the industrial action and the commitment of the workers to their cause. It shows that they are willing to forego their wages and benefits to make a statement or demand changes from their employers.
On the other hand, while the number of strikes, the number of workers involved, and the amount of revenue lost by firms are all important metrics in understanding strike activity, they may not directly reflect the sentiment of the workers participating in the strike. These measures can be influenced by various factors and may not always accurately gauge the level of dissatisfaction or resolve among the workers.