The experience of many African nations in the postcolonial era was marked by underdevelopment. But Botswana was able to successfully develop after independence. Which of the following factors was most important to Botswana's development?

Botswana received significant foreign aid from Western countries.

Botswana focused on exporting manufacturing goods on the international market.

Botswana had extensive mineral resources that provided them the money needed to develop.

Botswana invested in public goods rather than just providing benefits to a small elite.