The direct election of u. s. senators, women's suffrage, and greater government regulation of large industries were all issues of importance in the early 1900s to the a) democrats. b) federalists. c) know-nothings. d) progressives.

I believe the correct answer is the last one. d.) progressives. 

Ifound this on google “the existence of agglomeration economies is central to the explanation of how cities increase in size and population, which places the phenomenon on a larger scale. the concentration of economic activity in cities is one reason for their development and growth.” i hope this you for what your looking for.