Jacob Riis's book How the Other Half Lives was an example of what Theodore Roosevelt called A ) journalism
B) free trade.
C) muckraking.
D) Social Darwinism .

Jacob Riis's book How The Other Half Lives, written in 1890, remains an outstanding example of the importance of investigative journalism and the continued vitality of the Fourth Estate. Jacob Riis was among the earliest of what Theodore Roosevelt later termed " muckraker", "taking the rake to uncover the most unpleasant conditions in American society."