The best explanation why the area between Spain and Gaul was not part of the Roman empire until that later period was a culmination from both undesireability and difficulty in accessing this region due to its mountaineous nature. So I would wager the answer being both C and D - undesireability and difficulty in access.
National government was given too much power
Answer:
B.
B. A state association of teachers meets with members of the legislature to encourage them to support pending legislation.