Question

What was a muckraker?

Answer 1

A muckraker was A) a journalist that reported on the abuses, crime, fraud, and injustices in society.
Usually, they were considered to be the worst kind of journalists, seeking sensational stories about bad things that happen in the world. 

Answer 2

A muckraker was a journalist or group of semi-organized journalists that,at the beginning of the 20th century publicly reported political corruption,labour exploitation and a serie of abuses,crime,fraud and immoralities in society.

The correct option is: (A).