The rise of industry and growth of cities in the Northeast offered the greatest benefit for a. people who owned their own businesses or worked in skilled occupations. b. the working class, who often established businesses of their own. c. immigrants who qualified for jobs held by skilled craftspeople. d. the poor, who became wealthy doing work that other people avoided.

It is B.

The industrialization of the Northeast refers to the colonial period. The colonies of the north were colonies of population and the businesses of the region expanded rapidly, creating an industrial and commercial bourgeoisie.

In addition, other factors that influenced the industrialization of the region were its location near the ocean, the abundance of natural resources, and the religion that encouraged the accumulation of wealth through labor.

In this context, the great iron and steel industries, machinery industries, railway equipment, and so on arose. Together, there was the rapid development of cities and a huge amount of new accessories to serve the industry. All this benefited the working class, which was in an environment conducive to developing its own business.

The second answer is correct (B).