Which of the Following Is True of Entrepreneurship

Which of the following is true of entrepreneurship?

A) Entrepreneurial discovery is an important source of economic growth and higher living standards.
B) The role of the entrepreneur is not very important and that is why it is generally not included in economic models.
C) The role of entrepreneurial discovery could be easily integrated into economic models, but nonetheless economists choose not to do so.
D) Economic models are able to capture fully the important role of the entrepreneur in the market process.