18- The other – less studied of grammar that is considered distinctive grammar for social languages is ……
a) the “rules” by which grammatical units like nouns and verbs, phrases and clauses, which signal characteristic whos-doing-whats-within- Discourses
b) the “rules” by which grammatical units like nouns and verbs, phrases and clauses, which do not signal characteristic whos-doing-whats-within- Discourses
c) the “rules” by which grammatical units like nouns and verbs, phrases and clauses, which signal characteristic only of whos-within- Discourses
d) the “rules” by which grammatical units like nouns and verbs, phrases and clauses, which signal characteristic whats -within- Discourses