His HS participated in the dual credit system. B is the answer.
Articulation refers to transferring credits between post secondary institutions, college to college, not HS to college. So it cannot be answer D. The others cannot be right, because if he plans to do it and the question is asking for the reason why he CAN do this, then answers A and C aren't correct.
Liberty and justice for all
If we look at the Ancient Greece, the origins of Democracy are not closely related to the free market economy. But, in todays world, democratic institutions offer more freedom and less market intervention. At the same time, free market needs the democratic institutionalism.