How did jacob riis call attention to slum conditions? be specific

He called attention to slum conditions through taking photos and documenting poverty in New York City. This made him a famous campaigner against slum housing. He also led a team of photographers who were with the police to inspect a slum area. In there, a picture was taken and used as a document of urban poverty. One of his known photos was called "5 Cents a Spot" which displays a room filled with people staying together to sleep during the night. Through public slideshows and in his book entitled How the Other Half Lives, he used a lot of the photos he took and his descriptions to hit the conscience of rich Americans. 

Answer: tokugawa ieyasu (徳川家康, january 31, 1543 – june 1, 1616) was the founder and first shōgun of the tokugawa shogunate of japan, which effectively ruled japan from the battle of sekigahara in 1600 until the meiji restoration in 1868.

The correct answer is b