The Following Questions Refer to the Excerpt Below

The following questions refer to the excerpt below.
"The Cigar Manufacturers' Association had declared that under no circumstances would any leaders of the strike be employed for at least six months.As a consequence,for nearly four months I was out of employment.I had parted with anything of value in the house,and my wife and I were everyday expecting a newcomer in addition to the five children we already had.My family helped in every way possible…Blacklisted,I desperately sought employment…Once I was ready to commit murder. All the children were ill…"
Samuel Gompers,"Strike Baby",1878
-One underlying cause of the failures of strikes in this era was the

A) mechanization of agriculture.
B) industrialization of the New South.
C) growth of the industrial workforce as a result of immigration.
D) success of Progressive political reforms.