Reading the textbook, pp. 80ff., which one of the followings is true?

Patrick J. Hurley:
a) First distinguishes the cognitive meaning in language and then the vagueness occurring in the language.
b) First distinguishes the emotive meaning from the cognitive meaning in language and then explores the defective meaning in language by its using vague and ambiguous expressions.
c) First distinguishes the defective meaning in language by its using vague and ambiguous expressions, and then, thereafter, he distinguishes the emotive meaning from the cognitive meaning in language.
d) None of the above.