The answer is strongly dependent on WHAT trend you have in mind.
The dutch wanted gold just like the Europeans <span />
It should be the third answer choice. The nations of OPEC chose to cooperate primarily in order to manage the supply of a natural resource.
OPEC works to balance both the production and price of oil so that customers are able to receive a consistent supply of petroleum and investors in the industry are able to make profit from their investments.
Algae is warmful for the organisims of the area
