Who has discord and if so what is your user

Which of these is most responsible for differences between the twentieth century to the twenty-first century?

Which of these is an example of an integrated presentation? a. a table created in powerpoint b. an image pasted into powerpoint c. a caption created in powerpoint d. an excel chart pasted into powerpoint

Which syntax error in programming is unlikely to be highlighted by a compiler or an interpreter? a variable name misspelling a missing space a comma in place of a period a missing closing quotation mark