I believe the answer is A a connection with nature.
The correct answer is option d) It gave land to the states to build colleges.
Officially kown as Land-Grant College Act of 1862 or the Morrill Act was a Congress Act passed in 1862 which gave public land grants to States in order to build new colleges and Universities.
At the time, the United States had a handful of schools of higher education and this was seen as a way to simultaneously build universites all over the country and improve the overall skill level in the country.
With more than one branch of power.
Riis states that if the nation does not wipe out slums, the slums will wipe out.
He see the battle against slums as a battle with poverty. He states that the battle must be won as fasts as possible, stating that the slums are the enemy of civilization.