Muckrakers helps the labor movement by writing stories about unsafe conditions in factories.
Answer: Option B
Step-by-step explanation:
Muckrakers were the journalists and writers who were very famous in the progressive era and very influential and had great impact on the society and made people aware about ills which were present in the society.
They used to publish stories in newspaper and magazines about corruption, social injustices against the labor, child labor, poverty, unsafe working conditions, prostitution and many other ills like that and brought the ills of the American society and raise awareness and the anger of the people in the United States.