The reliance could be seen on how we acquire our military draft.
For example, countries such as Russia and south Korea implemented a mandatory military services for all adult men. (they're require to served at the military for around 1-2 years).
United states on the other hand, does not implement such mandatory military draft. All of our forces were acquired through voluntary methods without government force.
Since the nature of war has changed, voluntary method is more than enough since war that conducted on modern time would most likely relied on mass destruction weapons or advanced vehicles.
33 - They were indifferent about him
34 - Plessy v. Ferguson
35 - They wanted state policies to be like they were before the civil war
36 - Higher taxes on farmers
37 - Because farmers in the South were rich
They are called silent generation because they are the american generation born between the two world wars,who were too young to join the service when World War II started.
I would think it would be D.
A is incorrect as slavery was just made illegal.
B is incorrect as the United States could not allowed African Americans to not abide by laws.
C is incorrect as it encourage the slaves to assault the slave owners