HellllllllllllllllllllllllllllllllpppppppppppppppppppppppppppppppppppppppppppppppppppppThe number of _______________ significantly increased after the Civil War connecting the United States and creating a national market.
a. Railroads
b. Steel industry
c. Oil production
d. John D. Rockefeller
e. Andrew Carnegie
f. Monopoly
g. telegraph
h. Telephone
i. Electric light bulb
j. Ellis Island
k. Angel Island
l. Labor unions
m. American Federation of Labor
n. Plains Indians
o. Transcontinental railroad
p. “Muckraker”
q. Ida Tarbell
r. Upton Sinclair
s. The Jungle
t. Jacob Riis
u. Jane Addams
v. Jim Crow Laws
w. Plessy v. Ferguson
x. NAACP
y. 17th amendment
z. Conservation movement
ad. Spanish American War
bc. Imperialism
bd.Philippine-American War
be.Roosevelt Corollary
cd. Panama Canal
ce. Theodore Roosevelt
these are the option but only one of them are correct for this answer