Periodically is regularly occurring intervals whereas routine is something that is structured and in place for a set time and date
Answer: E.) To show how the consequences have changed or remained the same over time
The first pair, fourth pair, and fifth pair can be used to contrast the careers of writers and editors.
(this goes for the picture u have put in. if you need me to choose from the text you listed i can also do that) Hope that helped, if you don't understand, you can comment below and i'll edit it.
The play is set in the 1880s