Discussion

Explanation:

Option 1 misses out on the insertion of commas after ‘companies’ and ‘margins’. Secondly, it mentions, ‘looking upon’ which should ideally be ‘looking at’.
Option 2 is incorrect because of the word ‘look’. The entire paragraph is in simple present tense. Therefore ‘look’ should be replaced by ‘are looking.’
Option 3 is incorrect. ‘Looked at,’ should be ‘being looked at’. The conjunction ‘being’ is missing making the sentence incorrect.
Option 4 is grammatically consistent without any errors.
Hence, the correct answer is option 4.

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