I belive the answer is B.
The folly of men has enhanced the value of gold and silver because of their scarcity
Answer: save the plane
Explanation: you would save trillions of lives instead of 5
The simplified expression is 
Explanation:
The expression that we have in this problem is

We want to simplify this expression: in order to do so, we apply the rule to solve the square of a binomial:

Where in our expression, we have:

So, the various terms are:

Therefore, the final expression becomes

Learn more about simplify expressions:
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