Concept:The word “demands” refers to strong requests made by workers.Explanation:Workers make demands when they ask for something firmly, such as better pay or working conditions.Among the options, “requests” means asking for something, which matches the meaning of “demands.”The other options have different meanings: agitations are disturbances, complaints are expressions of dissatisfaction, and objections are reasons for disagreeing.Therefore, the best synonym for “demands” is “requests.”Answer:D. requests.