Muckrakers, like Jacob Riis, helped the Progressive Movement change Urban Living conditions by
a. Writing speeches, books, and taking pictures to show what the urban area
was really like
b. Striking to help the living conditions of the urban poor
c. Running for office to change the laws providing for more sanitation
d. Joining unions to fight for better pay, better hours, and better working
conditions

Explanation:

The muckrakers played a highly visible role during the Progressive Era. Muckraking magazines—notably McClure's of the publisher S. S. McClure—took on corporate monopolies and political machines, while trying to raise public awareness and anger at urban poverty, unsafe working conditions, prostitution, and child labor.

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories

interdependence is when all participating groups and individuals depend on each other. if you depend on one anothers goods, you end up trading in order to get the items you're looking for. (for ex: if i have food and you have water, we trade in order to depend on each other to live)