Since there are no options here, I believe that to make a claim effective, it must have a lot of strong evidence. It would also need to be quite logical and without errors and fallacies. It also depends on the person saying the claim - their posture and how they say it.
A statement for or against the topic and most supporting details
The correct answer is B - the writer's identity.
Imagine if you received a letter, and you start reading it, but you have no idea who is it from! It would be confusing. The day, who you are, and your information will be located at the top of the letter, then include the name and information of the person receiving, in the same format.
Example:
(Insert your name)
123 ABC St.
New York City, NY 99999
April 1st, 2017
Dr. Patricia Brown
777 West Ave.
Los Angeles, CA 111111
Dear, Dr. Patricia Brown,
(Purpose for writing goes here)
(An expression of thanks)
Sincerely,
(Insert your name)
If Mrs Hamilton is upper class she would see the slaves as peasants in a way. as I do not know what the slaves may look like, if they are black you could talk about racism and the fact that in the 1950s segregation was a huge issue. blacks were used to do chores for the whites.
hope this helps in some way