1.According to the passage， the public-sector workers who were most likely to belong to unions in 1977 were
(A) professionals
(B) managers
(C) clerical workers
(D) service workers
(E) blue-collar workers
2.The author cites union efforts to achieve a fully unionized work force (line 13-19) in order to account for why
(A) politicians might try to oppose public-sector union organizing
(B) public-sector unions have recently focused on organizing women
(C) early organizing efforts often focused on areas where there were large numbers of workers
(D) union efforts with regard to public-sector clerical workers increased dramatically after 1975
(E) unions sometimes tried to organize workers regardless of the workers' initial interest in unionization
3. The author's claim that， since the mid-1970's， a new strategy has emerged in the unionization of public sector clerical workers would be strengthened if the author
(A) described more fully the attitudes of clerical workers toward labor unions
(B) compared the organizing strategies employed by private-sector unions with those of public-sector unions
(C) explained why politicians and administrator sometimes oppose unionization of clerical workers
(D) indicated that the number of unionized public-sector clerical workers was increasing even before the mid-1970's
(E) showed that the factors that favored unionization drives among these workers prior to 1975 have decreased in importance