Final answer:
The best sample to determine the average wage of working people in Mumbai would be many randomly selected workers in each of several working districts of Mumbai.
Step-by-step explanation:
The best sample to determine the average wage of working people in Mumbai would be option C) Many randomly selected workers in each of several working districts of Mumbai. This is because selecting workers from different districts ensures that the sample is representative of the entire population of working people in Mumbai. Randomly selecting workers helps eliminate bias and increase the generalizability of the findings.