"The Big Apple"

The most populous city in the United States, New York City, New York, has a variety of nicknames: "America's Mecca", "Gotham City", "The City of Light", "The City that Never Sleeps", "The financial capital of the world", etc. Undoubtedly, the gate way to America is most commonly identified as "The Big Apple".
The origin of New York City's trademark is a modern day mystery, unknown to the common person. Some attribute its origin to the city's jazz community in the 1920's and 30's. Others give credit to the 1920's New York Times journalist, John Fitzgerald, who acquired the term from stable hands in New Orleans. Use the following materials found on this page to discover the truth for yourself.
Articles:
http://www.classbrain.com/artstate/publish/article_951.shtml
http://gonyc.about.com/cs/atozinde1/a/bigapple.htm
Video:
Questions:
1.) What is your favorite theory from the video's "Myth and Theory" section?
2.) According to both the article and the video, what significance does the 1970's have on the development of New York City's trademark?
3.) Using the material given, create a timeline of the origin of NYC's nickname.