Question

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

Explanation:

Lincoln Steffens was a muckraker journalist who exposed corruption and problems in business and politics, which is what made him a reform - minded figure. Just being a journalist, writing about modern issues, or being wealthy and American - born are not the specific reasons for his reformer status.

Answer:

worked to expose problems in business and in politics.