A nation seeking to escalate its overall productivity might be best assisted by investing money into technology. Developments and advances in technology which interprets into a more productive economic activity as creation and delivery of goods and services are improved.
I believe the answer is: D. Technology
Advancement in technology would increase the likelihood of the creation of an invention that could increase the efficiency of a certain action. This efficiency would make the process of finishing this action become a lot faster, which would increase overall productivity in the long run.
