Answer:
Changes in the meatpacking industry with the passage of the Pure Food and Drug Act
Explanation:
The correct answer to this open question is the following.
Although the question is incomplete because it does not provide a specific reference about the author of the letter or any other reference, we can comment on the following.
A primary source is the piece of information that was written by a character or an individual that lived in the moment of the event, was part of the event, or witnessed the event. This individual could have written a letter, or a document -including a book. Or he/she took a photograph. Or was part of an interview. The secondary source includes information from a third person who was not part of the time or event but has found information through other resources. It is the case of an encyclopedia or researchers/historian books.
C. The Iran Hostage Crisis
Market Economy is the economy that is the most commonly used in the United States such as grocery stores and restraunts
Command economy is a Economy completely runned by the government Countries who have one is North Korea, and Cuba
Traditional is a non timed pasted economy system that mainly the American Amish use
