Bob Does Very Well on All of His English Papers

Multiple Choice

Bob does very well on all of his English papers and is praised for his skilled writing. However, when he is around his friends he says things like "ain't" and "like" often, though his sentences are still grammatical. When writing he is following ________, while when speaking he is following ________.

A) prescriptive rules; prohibitive rules
B) syntax; descriptive rules
C) prescriptive rules; descriptive rules
D) prescriptive rules; linguistic universals