It is suggested that proverbs are closely related to all of the following EXCEPT ______.

A．proverbian citizenship
B．residence permits
C．comparable approximation
D．oral circulation

A．Many experts on proverbs abandon the efforts to define a proverb.
B．It is impossible to tell others what makes a sentence a proverb.
C．A generally accepted definition of a proverb should caver all specifics.
D．Anyone can easily tell others what proverbs are.