[求助]GMAT Test5-19题

19. Recent estimates predict that between 1982 and 1995 the greatest increase in the number of people employed will be in the category of low-paying service occupations. This category, however, will not increase its share of total employment, whereas the category of high-paying service occupations will increase its share. If the estimates above are accurate, which of the following conclusions can be drawn? (A) In 1982 more people were working in low-paying service occupations than were working in high-paying service occupations. (B) In 1995 more people will be working in high-paying service occupations than will be working in low-paying service occupations. (C) Nonservice occupations will account for the same share of total employment in 1995 as in 1982. (D) Many of the people who were working in low-paying service occupations in 1982 will be working in high-paying service occupations by 1995.（A） (E) The rate of growth for low-paying service occupations will be greater than the overall rate of employment growth between 1982 and 1995. 答案为什麽是A呢？想不通，D 怎麽不对呢？