On the forbes 2015 list of the​ world's billionaires, bill gates ranks at the top with a net worth of ​$79.2 billion. does this​ "richest man in the​ world" face​ scarcity, or does scarcity only affect those with more limited incomes and lower net​ worth? source​: ​"the world's​ billionaires," forbes​, march​ 2, 2015.
a. he faces scarcity because his resources are unlimited.
b. bill gates faces scarcity because resources are limited.
c. the​ "richest man in the​ world" does not face scarcity because he has more money than others.
d. bill gates does not face scarcity because he is a billionaire.