Answer:
completely randomized (answer from Khan Academy)
Explanation:
This study is an example of a completely randomized design since each subject is randomly assigned to one of the treatment groups without extra consideration to other variables.
The biggest reason behind changes to the Social Security Act (in 1939) was to make sure this program helped more people in American society. One of the amendments made to the Social Security Act was the implementation of survivor benefits. If a person was to die unexpectedly and had paid into the system, family members would be able to receive the money owed to that person who passed away unexpectedly.
Besides survivor benefits, retired workers collecting Social Security could set up a payment system where their children or spouse received money as well. All of these changes lead to Social Security having a more positive affect on the American family as a whole.
The answer is D, Kaiser Wilhelm was the last German Emperor (Kaiser) and King of Prussia, ruling the German Empire and the Kingdom of Prussia from 15 June 1888 to 9 November 1918.
Your answer is.......D. The Declaration of Independence
