The correct answer is D.
Magnets only attract to the opposite poles.
North and South poles attract.
North and North poles do not.
Hope this helps.
Answer:The primary purpose of a free-trade zone is to remove from a seaport, airport, or border those hindrances to trade caused by high tariffs and complex customs regulations.
Explanation:
1. Invasions by Barbarian tribes. The most straightforward theory for Western Rome's collapse pins the fall on a string of military losses sustained against outside forces. Rome had tangled with Germanic tribes for centuries, but by the 300s “barbarian” groups like the Goths had encroached beyond the Empire's borders.
I only know one reson sorry!
It could be argued that "Persia" was under the influence of both Russia
and England, but this depends heavily on the extent of that influence
and the time in question.
Balance and keep its population, from being overpopulated or being too crowded.