Why is it significant that Karen Blumenthal was fortunate enough to have interviewed several people who knew Steve Jobs personally?

It indicated that Karen Blumenthal had a good working relationship with Steve Jobs.
It indicates that Steve Jobs thought that Karen Blumenthal was worth speaking to.
It is primary research, and therefore more reliable.
It is always best to speak directly to someone you are writing about.

It is primary research, and therefore more reliable.

Explanation:

Karen Blumenthal said ''My first job as a business reporter in the early 1980s was covering the beginnings of the personal computer industry, so I learned a lot about all the players, including Apple. As an editor, I oversaw coverage of Compaq and Dell, Apple’s competitors, and I had recently helped a business-school professor with a chapter on Jobs’s management strategy.'' which means that she had a lot of luck since she was able to speak with Steve Jobs co-worker and other people of Apple company. She researched details about his early life through his co-worker and other details about his job with the others.

She was also doing her research through reading magazines and books about Apple company and she got informed by the people who were fanatics about it, for example, her eye doctor.

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