A low literacy rate usually indicates that a country lacks

A.
capital goods.

B.
a strong agricultural sector.

C.
human capital.

D.
a strong industrial sector;

C. human capital.

The correct answer is C. human capital.

To arrive at this answer, it's important to understand the meaning and significance of each of the options provided.

A. Capital goods refers to the physical assets used to produce goods and services. While having a lack of capital goods may impact a country's productivity, it is not directly related to the literacy rate.

B. A strong agricultural sector focuses on the production of crops and livestock. Although it can contribute to a country's overall development, it is not directly correlated with the literacy rate.

C. Human capital refers to the skills, knowledge, and capabilities possessed by individuals in a society. A low literacy rate indicates that a significant portion of the population lacks basic reading and writing skills, which limits their ability to acquire knowledge, learn new skills, and contribute to economic development. Thus, a low literacy rate is associated with a lack of human capital.

D. A strong industrial sector refers to the development and production of manufactured goods. While industrialization is often linked to economic growth, it is not directly related to a country's literacy rate.

Therefore, the correct answer is C. human capital, as a low literacy rate generally signifies a lack of basic skills and knowledge in a population.