Directions: In the following question there are sentences that form a paragraph. Identify the sentence(s) or part(s) of sentence(s) that is/are correct in terms of grammar and usage (including spelling, punctuation and logical consistency). Then, choose the most appropriate option.

A. The whole spinal column is surrounded in

B. a number of interlocking muscles and ligaments.

C. The manufacturing was extremely expensive until

D. assembly-line techniques made them cheaper to produce.

E. The winding roads of Simla are less in number than Ludhiana.