Answer:
If a country wants to increase its GDP, it should Invest in human capital , Invest in capital and to create an environment conducive (likely or possible) for entrepreneurs.
Option D.
Step-by-step explanation:
I choose this option because all the three factors are necessary to increase the nation's GDP (gross domestical product) and it is because the first option is regarding the labour force (intiated employment) and the second one is investment in all fields, as this would result in more production of goods which is added to GDP.
The third option is about removing the barriers for the investors such as tax, legal formalities and also intiating them to participate actively by certain measures