Which of the following is not an example of standardization instituted by shi huang-di?
ancient china

a. standardized size of roads

b. buddhism as state religion

c. common currency

d. common weight and measures system

it provided for selection of government employees through competitive examinations. it also made it unlawful to fire or demote covered employees for political reasons or to require them to give political service or payment, and it set up a civil service commission to enforce the law.

explanation:

d. it adversely affected american productivity