Bill Hickey is an employee of the Middleburg school district, and John Morgan is associated with that district as well. At meetings, Bill frequently has to push to get new school programs approved or to hire particular personnel, whereas John frequently derails Bill's proposals, looking to cut costs or to recommend his own candidate for employment. Which of the following most likely describes their positions?
a. Bill is the assistant superintendent of instruction, and John is a building principal.
b. Bill is a teacher, and John is the department chairperson.
c. Bill is the superintendent of schools, and John is the chair of the school board.
d. Bill is the assistant superintendent of instruction, and John is the assistant superintendent of personnel.