I believe the answer you are looking for is: "a violent or destructive protest." The government would be most likely to become involved in a union protest that is violent or destructive.
Answer:
A. Europeans had conducted more exploration in South America than North America.
Explanation:
In 1507 the cartographer Martin Waldseemüller published the first world map in which the newly discovered continent was given the name of america, on this map it is observed that it is completely separated from Asia, which until then was not considered, since it I thought that the new lands discovered were part of the Indians in Asia. It can be seen that the vast majority of what was known of America until then was the southern part.
Waldseemüller, M. (1507) Universalis cosmographia secundum Ptholomaei traditionem et Americi Vespucii aliorumque lustrationes. [Strasbourg, France?: s.n] [Map] Retrieved from the Library of Congress, https://www.loc.gov/item/2003626426/.
Filth (like sewages)= how to keep it from potable water sources. Crime = too many poor people and not enough income available.
Disease = they were pretty dirty people, disease & death were at high rates.. many infected bodies to dispose of.
The school system in India has four levels: lower primary(age 6 to 10), upper primary(11 to 12), high(13 to 15) and higher secondary(17 to 18). The lower primary school is divided into five”standards”, upper primary school into two, high school into three and higher secondary into two. Hopefully this helps you.