I believe that the answer is a
the political, military, and social system in the Middle Ages, based on the holding of lands in fief or fee and on the resulting relations between lord and vassal.
An increase in the standard of living for a country will have more access to goods and services with a longer expectancy of life and health care. Thus the correct answer is D.
<h3>What is the standard of living?</h3>
An economic group or geographic area's living standard refers to the amount of wealth, comfort, materialistic goods, and requirements available to them.
An increase in the standard of living indicates the high purchasing power of individuals reflecting the economic stability of the country. If the country is stable it will provide sufficient resources to survive.
When the standrd of living developed there will be more access to resources which will maintain the health of the individual and leads to a higher expectancy of life.
Standard of living leads to access to healthcare facilities due to an increase in the economic stability of any individual. This is significant because the more a person's production and satisfaction, it will improve the economy.
Therefore, option D all of the above is the appropriate answer.
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