The United States entered WWI in April of 1917. Less than a month later, the law below was passed by Congress:
The Selective Service Act of 1917: required registration of all men aged 21 through
30, was intended to supply the military and war-related industries, provided
exemptions for civil servants and clergy, exempted conscientious objectors from
combat, allowed no paid substitutes, 9.9 million men were registered by June and
687, 000 men were immediately inducted.
So many people were required so quickly because the US had previously:

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.

answer; i believe its (jade); good luck

answer: the purpose of the "index of forbidden books" was to prevent the contamination of the faith or the corruption of morals of roman catholics according to canon law, through the reading of theologically mistaken or immoral books. the condemnation of published books, thus listed in the index librorum prohibitorum.

explanation: index librorum prohibitorum, (latin: “index of forbidden books”), list of books once forbidden by roman catholic church authority as dangerous to the faith or morals of roman catholics. publication of the list ceased in 1966, and it was relegated to the status of a historic document.

the 20th and final edition appeared in 1948, and the index was formally abolished on 14 june 1966 by pope paul vi. the aim of the list was to protect the faith and morals of the faithful by putting a stop to the reading of theologically, culturally, and politically disruptive books.