The Amazon river flows through Peru, Bolivia, Columbia, Venezuela, Ecuador, and Brazil in South America
Huge Capital Outlay
Lack of Flexibility
Lack of Door to Door Service
Monopoly
Unsuitable for Short Distance and Small Loads
Booking Formalities
No Rural Service
Under-utilised Capacity
I'd say the answer is D. Hope this helps :)
As far as a threat, North Korea has been seen as such for many years (since WWII), when North Korea sided with Russia. America and its Capitalism were not fond of the Communist party, and so we have really been fighting/being concerned about Russian influence.
Historically North and South Korea have been in conflict many years before America and Russia got involved. When we did though it got worse.
Trump has done very little to resolve this, some would say he is making it worse.
AND as for any current events ask Google!