Answer:
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.