Answer:
B. an increase in the quantity of capital per hour worked
A. technological change
Explanation:
Modern economics operates by combining the two factors of production, labor and capital. The labor factor is influenced according to the education level of the workers. Thus, the more access to education, the higher the productivity of work. In addition, labor productivity is affected by the division of labor (increased workforce) and technological development. The increase in the quantities of capital affects the capital factor (inputs, machinery, etc.), not the labor factor.
The structural and sustainable change of an economy occurs through technological development. This is because technology is the factor capable of increasing the productivity of the factors of production: capital and labor. For example, technology can make the natural resources needed for production rationalized, that is, used to a lesser extent. This is a way to sustainably increase production.