Which of the following theories proposes that one unit of US domestic currency will buy the same basket of goods and services anywhere in the world?

The parity distribution method does not specifically relate to currency value or purchasing power across countries. Instead, it typically refers to a method of distributing resources or costs in economic contexts, failing to address the comparative purchasing power of currencies.

The law of parity demand is not a widely recognized economic theory. It may imply some relationship between demand and price but does not encompass the broader concept of currency value and purchasing power across different economies. Thus, it is not relevant to the question about currency purchasing power.

International parity option is not a standard term in economic theory related to currency purchasing power. It may imply various financial instruments or agreements but does not describe the principle that a currency should buy the same basket of goods globally. This choice misrepresents the established theory of purchasing power parity.