GMAT Critical Reasoning (CR) | Established companies often focus on defending the market they current

Got this question in VeritasPrep Mock # 4. I marked Option B) in the mock. After analyzing the question, option B and option C are close.

Established companies often focus on defending the market they currently dominate. As a result, they tend not to focus resources on potential new markets and tend to underestimate or ignore shifts in market dynamics. A clear case of this inward-looking strategy is

Which of the following best completes the passage?

a) a century-old paper manufacturer that adapts
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