Why would a student use roman numerals to learn about history?

Which of the following is one example of an ideological conflict that became one of the causes of world war ii?

According to robert kennedy, how might the historian see 1962a. as a year of resistance by the southb. as a year of great progress in civil rightsc. as a year of rioting and violenced. as a year of resegregation

"if i have seen farther than others," said newton, "it is because i have stood on the shoulders of giants." who were the giants to whom newton was referring? could this be said of any scientific accomplishment? explain.