Question

lincoln steffens was considered a reformer specifically because he worked to expose problems in business and in politics. was wealthy and born in the united states. wrote about modern issues. was a journalist.

Explanation:

Lincoln Steffens was a muck - raking journalist who exposed corruption and problems in business and politics, which is why he was considered a reformer. Just being a journalist, wealthy, born in the US, or writing about modern issues isn't what specifically made him a reformer. His work in uncovering and highlighting systemic problems was key.

Answer:

worked to expose problems in business and in politics.