Britain is noted for the establishment of a patent system which has been in continuous operation for a longer period than any other in the world. W...

Britain is noted for the establishment of a patent system which has been in continuous operation for a longer period than any other in the world. What is the main idea of the text?

The British patent system is the oldest in the world.
The British patent system has been in continuous operation for a longer period than any other in the world.
The British patent system is the most efficient in the world.
The British patent system is the most modern in the world.
a) Only item I is correct.
b) Only item II is correct.
c) Items I and II are correct.
d) Items II and III are correct.
e) Items II and IV are correct.