Examine the following passage on the railway strike of 1894. The numbers in brackets give the sentence numbers. (1) In 1894, workers belonging to the American Railway Union went on strike against the Pullman railway car company. (2) The workers made frameworks for car seats, trolley roofs, and other pieces for the cars, and were paid by the piece. (3) When Pullman cut salaries, the Union decided to strike. (4) The union argued its case first by citing Pullman's wealth. (5) Pullman maintained that cutbacks were necessary in a depression year, but the union argued that Pullman's profit margin over several years enabled the company to pay adequate wages. (6) The union also pointed out that workers had been forced to live in company housing and pay high rents. (7) In sum, the union argued that Pullman had turned its workers into wage slaves. Which could substitute " In sum" in sentence 7?
A-however
B-Finally
C-For instance
D-Therefore
E-Also