Explanation:
Horace Mann
Credit for our modern version of the school system usually goes to Horace Mann. When he became Secretary of Education in Massachusetts in 1837, he set forth his vision for a system of professional teachers who would teach students an organized curriculum of basic content.
The correct answer is associative/ fictive kin.
Associative kin refers to a relationship between individuals, where they are not related by blood or family ties, yet, their bond is akin to that of family members or close relatives. Associative kin are likely to spend holidays together, vacation together and see each other regularly. In this instance, Marie shares an associative kin relationship with Danny and Karen's family since they have a close bond.
During World War I, 116,516 US soldiers were killed and 204,002 were wounded. If you add those two numbers together, the total number of US soldiers killed or wounded was 320,518.
You can represent that as a fraction of the current population of Chicago like this:

For simplicity's sake (since I assume the Chicago population number is an estimate), let's round the number of soldiers killed or wounded down to 300,000. That would look like this:

We can simplify that down a lot by dividing the number of soldiers and the number of Chicagoans by the least common denominator of 300,000. That would give us this fraction:

So for every 1 US soldier killed or wounded in World War I, there are 10 Chicagoans living in the city today.
Answer:
A
Many Indians joined the British military to fight in World War I.
Explanation:
The Amritsar massacre fundamentally changed how the Indians saw the Raj (the era of British rule, which ran from 1757 to 1947). It led Mahatma Gandhi, who during the first world war had forsaken his pacifism to help recruit soldiers to preserve the empire, to see British rule as satanic.
Answer:
Social problems are usually present constantly, making it difficult to mark change.
Explanation:
Simply put, a social problem is any condition which affects a large number of people and is usually negative.
Therefore, the BEST Explanation as to why it can be harder to have an issue that impacts those in the lower realms of society defined as a social problem is that social problems are usually present constantly, making it difficult to mark change.