D. For the first one
C. For the second one
A. 40 percents of the world pop and half of the economic outcome.
It was caused by a mix of different scenarios. Rome was constantly attacked by Barbarian tribes; they were over-expanded, which made it really hard for them to keep their entire empire under control; they had a lot of economic problems and relied too much on slave labor; and they spent way too much money on their military, just to name a few factors.
The statement that is false about the economic of pacific islands is : most pacific island countries import large quantity of raw materials in order to export finished products
It's the other way around, most pacific island's countries produce Raw material to the more developed countries
hope this helps