From a Micro View, Which of the Following Is the Best

From a micro view, which of the following is the best example of marketing?

A) North Korea unveils a new five-year production plan.
B) China and the U.S. agree on a new trade agreement.
C) The American Red Cross seeks more blood donors.
D) The Internet makes it possible for firms to reach customers in other countries.
E) None of these is a good example.