Is this sentence grammatically correct?(inside the question)?

Either one is correct. Persons is the more formal term, however There is some confusion regarding the two terms, especially because their meaning and usage suffered a mutation along the centuries. Both derive from Latin, but from different words Person derives from persona, which refers to an individual.

People, on the other hand, derives from populum, and it refers to a group of persons sharing a culture or social environment Person is a singular form, and its plural is persons. Over the time, however, many writers started to adopt people as the plural form of person, and nowadays it is widely accepted. Notice that legal and very formal texts still use persons as the plural form One distinction that was proposed was to use persons as long as there was a countable number of individuals (e.g. , 67 persons left the school) and people when such a number was large and indefinite (e.g. , the people left the stadium quickly).

The rule did not catch on, though, and some writers still use people even when there is a definite or small number of individuals Finally, people can also be used in the plural form (e.g. , the peoples of Asia) when it refers to the different cultural groups that live in a certain region.

Persons is sometimes used for formal or official purposes.

I think it is. Usually for signs and stuff like that they do use "Persons".

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.