The correct answer is this one:
<span>D. specialization and trade.
Unequal specialization of resources would lead the region that has some resource to specialize in it, and to trade this resource for other goods (I am re-phrasing what the paragraph said).
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Only some natural elements reflect light. Most do not, but to some that do are diamonds.
Have a nice day! :)
Yes, that's true. Strong a<span>rgument should be supported by evidence. </span>
Here is the formula to calculate GDP:
GDP<span> = C + G + I + NX
</span>Where I is the investment that include all form of capital expenditure
Both sales mentioned above could be considered as a form of Capital expenditure, so the total contribution to GRP would be:
$30 + $ 15 = $ 45