A Scottish Butler in an English Mansion Says to the Lady

Multiple Choice

A Scottish butler in an English mansion says to the lady of the house,"You may wish to stay inside today,Madam;it's quite cold outside." But when he goes back to his own cottage he is likely to say to his wife in broad Scots,"Shut the door and get inside,Maggie,you'll freeze your buns off." In linguistics,this is an example of:

A) code switching.
B) class consciousness.
C) glottochronology.
D) phonological analysis.
E) linguistic nationalism.