Which statement of the following is true?
A. Driving licences may be obtained by any UK resident over the age of 15 years , but they can only start driving when they are 17.
B. Holders of provisional licences are allowed to drive on motorways.
C. The provisional licence may be exchanged for a full licence after the holder has passed the practical driving test.
D. A speed limit of 38mph usually applies in built-up areas.