B. Better managing our natural resources
Hitler was born and raised in Austria until going to Germany in 1913 (I believe).
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!
The waxy coating on their leaves is being damaged by B) acid rain <span />
The Nile River is located in Africa