A number of sentences are given below which, when properly sequenced, forms a coherent paragraph. Each sentence is labelled with a letter. Choose the most logical order of the sentences from among the four choices to construct a coherent paragraph:
A. All levels of demand, whether individual, aggregate, local, national, or international are subject to change.
B. At the same time science and technology add new dimensions to products, their uses and the methods used to market them.
C. Aggregate demand fluctuates with changes in the level of business activity, GNP, and national income.
D. The demand of individuals tends to vary with changing need and rising income.
(a) CBDA (b) DCAB (c) BCAD (d) ABCD

• answer is .....(b) DCAB
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• ans-b.....................
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• ans is
  b)DCAB
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