How often does the united states attempt to count every person in the country?

answer; i believe that the correct answer is (d); //declaration of independence; plz check first good luck

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".