Answer:
All of the above are correct
Explanation:
For a poor country to catch up, there has to be an improvement in its infrastructure, education, human capital, innovation, unemployment levels and security.
If there's an outbreak of disease, human capital is negatively affected and this can hamper development .
Also, if heavy tariffs are imposed on companies , it would increase the cost of doing business. This might discourage firms from setting up in that country. This can negatively affect innovation and levels of employment .
If officials are corrupt, the funds needed to build infrastructure and provide basic amenities would be embezzled. This would affect catching up
I hope my answer helps you