At the turn of the 20th century, a group of US journalists, known as____ exposed various dark sides of the seemingly prosperous society.
A. Black Death
B. the South Island
C. African Americans
D. the Muckrakers
E. Electoral College
F. multiculturalism
G. service
H. the Higher Education Authority
I. film
J. The Crying Game
K. the North Island
L. Domesday Book
【正确答案】：D