Which of the following statements is true? A. Sound waves create areas of high and low pressure.
B. Areas of high pressure are called compressions.
C. Areas of low pressure are called rarefactions.
D. All of the above.

Imagine you are a business executive who wants to pursue an environment policy for your company that limits pollution and uses fewer raw materials but would cost more what might be the discussion to your next broad meeting how would you make your case to your shareholders