Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent paragraph.
A. Fibres are thin long pieces of material which are spun into threads for making cloths, ropes, etc.
B. Fibres of natural origin are further classified into two groups: those of vegetable origin and those of animal origin.
C. Fibres can broadly be classified into two categories: fibres of natural origin and fibres of artificial origin.
D. Artificial fibres can again be subdivided into two groups: modified forms of natural fibres and synthetic fibres which are directly synthesized.