Which of the Following Is an Example of Productive Inefficiency

Multiple Choice

Which of the following is an example of productive inefficiency?

A) Scientists discover a new substance that dramatically increases potential steel production.
B) A demographic boom leads to a rise in the number of workers in the labor force.
C) The rate of unemployment falls to zero.
D) Computer technicians are forced to answer telephones rather than perform their normal duties.
E) Due to economic growth,the economy reaches a new point along its production possibilities frontier.