I would say appeal based on logic. I'm not entirely sure, but that's what makes the most sense to me :)
When postwar expansion slowed in the 1950s, an economic stimulus was provided by higher consumer spending, due to the increased incomes of the middle class.
Answer:
1986
Explanation:
In commemoration of Dr. King's birthday, the third Monday in January was declared a federal holiday in 1983 and observed for the first time in 1986