________ Invented the Incandescent or Electric Lightbulb

Q30: By 1900,the average yearly income of American

Q31: Herbert Spencer and William Graham Sumner could

Q32: Andrew Carnegie's The Gospel of Wealth promoted

Q33: In the late nineteenth century,the social writer

Q34: In 1917,automobile production in the United States<br>A)

Q36: The new rationale for capitalism in the

Q37: Around the turn of the century,relatively few

Q38: Both the Knights of Labor and the

Q39: The Pennsylvania Railroad was created by<br>A) the

Q40: In the late nineteenth century,industry in the