A nation's infrastructure refers to Multiple Choice a) public capital goods such as highways and sanitation systems. b) its stock of technological knowledge. c) its ability to realize economies of scale. d) the productivity of its labor force.

Option A, public capital goods such as highways and sanitation systems, is the right answer.

Explanation:

The term infrastructure is used to describe the essential physical systems of a nation, for instance, communication, water, sewage, electric, transportation, highways and sanitation systems etc. In this way, infrastructures are the basic facilities that are meant to be served for a nation, state or any other area. Both the public and private physical developments made an infrastructure. Such infrastructures are generally

high-cost investments and are essential for the development and economic growth of a country.

In the given options, option A, will be right.