The correct option is C All of the above
All the above mentioned functions are performed by an entrepreneur which lead to economic development. He makes investment in the firm, which leads to rise in capital formation in the economy. This in turn generates employment opportunities and increased production goods and services, further, income is earned by people employed and profit is generated. This improves the per capita income in the income, which will further increase capital formation, and hence, sustain the process of economic development.