Over the Past 70 Years,which of the Following Has Occurred

Over the past 70 years,which of the following has occurred?
i.The service sector has grown so that now about 80 percent of workers are now employed in the service industry.
ii.The manufacturing sector has shrunk,so now about 20 percent of workers are now employed in the production of goods.
iii.The percentage of workers employed in the service industry has increased steadily.

A) i, ii and iii
B) i and iii
C) ii only
D) i only
E) ii and iii