Answer:
B.
Step-by-step explanation:
An enclave is a territory surrounded by territory of other state. It is an outlying part of a country that is mostly or partly surrounded by another state's territory.
The difficulties faced by an enclaves is that the border is controlled by another state, which may hinder the enclaved territory during conflict times. During such times, borders of other states may cut off access to trade.
Therefore, option B is correct.