The case Frye v. United States in 1923: Select one: a. was the first time fingerprints were used as evidence. b. established standards for accepting scientific evidence c. established rules for searching crime scenes d. established the right to have an attorney appointed to you if you could not afford one

B) established standards for accepting scientific evidence

Explanation:

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".