D.
It would be the period after 1965
Hong Kong authorities barred pro-democracy activist Joshua Wong from an election as the city’s leader warned Tuesday that months of violent protests have pushed the city to the brink of recession. ... What initially were massive but peaceful marches and sit-ins have intensified into ...
The answer is A because the significance of gunboat diplomacy is military threats which is a foreign policy used to scare the less powerful nation so that they follow the most powerful nations demands.
Advances in technology, new industries, growth of cities and new forms of transportation.
