Answer:
Option B. It allowed leaders in different parts of an empire to easily communicate is the correct one.
Step-by-step explanation:
Option A is of course not correct as colonial empires tried to preserve their colonies as long as possible due to resources it provided them.
Option B is correct as it enabled the easier way of communication and transmission of information.
Option C is not correct as monitoring of information was not something that was easily achieved when the telegraph was invented.
Option D is not correct as independence movements were not to be shut down that easily.