Each of the following presidential roles is mentioned in the constitution except
a. chief legislator
b. chief of party
c. chief of state
d. chief administrator

I believe the answer is: D. chief administrator

Chief administrator is the position that exclusively exist on the states level. For each states, the governnor would held the duty as the chief administrator.
The main duty of the chief administrator is to ensure that each government agencies operate according to their standard.

The answer is society was a caste like system with poor whites at the bottom of the white social ladder.