GMAT Sentence Correction (SC) | Re: The spokeswoman for the national laboratory announced that, while the

The spokeswoman for the national laboratory announcedthat, while the lab had been operating at a loss in the 1990s , it had become profitable in 2006, and would continue to yield high profits at least until 2025.

---, while the lab had been operating at a loss in the 1990s, --- Is this just an inessential info or a required necessary info? Let’s remove the part and see.

The spokeswoman for the national laboratory announced that it had become profitable in 2006, and would continue to yield
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