Ray Baker (also referred to by his pen name of David Grayson) was an American journalist who was prevalent during the late 19th century and early 20th century. During his muckraking days for McClure magazine, Baker was known for investigative journalism alongside the likes of Ida Tarbell and Lincoln Steffen.
........ OKIE this took me a long time to answer and understand but what they are saying in English is the 3 principles that they gave you. Pick two of them and write an essay. hope this helps sorry if it made it more confusing. They just added a few extra steps