Which of the following statements about Thesaurus is true?

(A). The word `thesaurus' comes from Greek term `thesauros' meaning a storehouse or treasury of words.

(B). Helen Brownson is said to be the first person who used the term `thesaurus' in the context of information retrieval

(C). Based on the nature of terminology control, there are mainly two types of thesauri

(D) Non-hierarchical Relationship refers to superordinate and subordinate relationship for a concept.