Answer:
I think your answer is D. Accurate calendar systems.
Explanation:
An advantage Johnson had over Kennedy was that he had more knowledge on how congress worked.
Jim Crow was the name of the racial caste system which operated primarily, but not exclusively in southern and border states, between 1877 and the mid-1960s. Jim Crow was more than a series of rigid anti-black laws. It was a way of life.
