Which is an example of a capital resource?

A) metal tools

B) low-Cost labor

C) an abundance of coal

D) a clean water supply

Hint: capital resources are goods made by people that are used to produce other goods and services

The right answer is "A) metal tools "

Basic categories of capital resources include tools, equipment, buildings, and machinery. However, any good used by a business to produce other goods and services is classified as a capital resource, including mundane items such as shipping boxes, invoice forms, pens, or file cabinets.

Im pretty sure A, my reasoning is if people make metal tools then they can use those tools to make other goods.

FYI Im going entirely off the hint so i may be wrong.