Jacob riis was most known for his late 19th century work in exposing the horrid living conditions
a) on the great plains.
b) on indian reservations.
c) on southern plantations.
d) in urban slums and ghettos.

d

Explanation:

I got the answer off line but it should be right

frederick william of brandenburg-prussia trained his son, frederick, to be a hardy soldier. but frederick disliked rifle shooting and horseback riding. unlike his father, he was interested in french literature. he enjoyed poetry and music and, like some others of the enlightenment, he scoffed at religion. his father thought him soft, frivolous and unmindful of his duties. and when frederick refused to put his signature on a right to succession, for a few moments his father strangled him.