Which of the following contributed to Grover Cleveland's narrow victory in the 1884 presidential election?

A) He promised to increase the pensions of Union army veterans.
B) A New York Protestant minister's attempt to slur the Democrats angered the state's Irish Catholics.
C) It was revealed during the campaign that major railroad companies had made hefty contributions to the Republican campaign.
D) Republican candidate James G. Blaine was unable to campaign during the last two weeks of the campaign because of a bout of influenza.

Grover Cleveland

The 22nd and 24th President of the United States who is known for his integrity, commitment to reform, and opposition to the spoils system in government.

Protestants

Followers of Protestantism, a branch of Christianity that originated with the Reformation, characterized by rejection of the authority of the Pope and emphasis on the Bible.

Irish Catholics

refers to members of the Catholic Church who are ethnically Irish, a group that historically faced discrimination and played significant roles in the cultural and political life of countries like the United States.