B)to have mass-produced

C)by means of

B)though

A)accelerating

A)as a result of

E)mass-produce

D)against

D)to be mass-produced

A)as if

C)having mass-produced

C)challenging

E)as opposed to

D)due to

Great Britain was one of the most powerful nations in the World in the 18th century. It led the world in (17) new sources of energy for making textiles and concentrating the process in factories. This was the Industrial Revolution. In new England, America, small factories first appeared in the 1790s. Thereafter, the proportion of manufacturing carried out in northern factories steadily rose (18) , individual and primitive ways of production. By 1850, Americans were pioneering ways (19) clocks and firearms using interchangeable, machine-made parts. Goods poured out of New England and Midwestern factories, and they spread (20) the world. Industrialization fell behind in The South, (21) it was not unknown.

E)towards

D)eliminating

B)such as

A)to mass-produce

C)in case

C)across

B)beyond

E)recruiting

E)just as

D)only if

B)utilizing