The most obvious difference between the working class and the middle class in English is thek ______ .

A．who were born as aristocrat
B．who have the right to sit in the House of Lords
C．who speak in many different local accents
D．who are prosperous businessmen or professionals

A．Because it sounds too servile and is likely to cause embarrassment.
B．Because it can only be used in certain occupations.
C．Because it is an impolite word.
D．Because it shows that the speaker is not a well-bred person.