Sentence Correction (SC) | Re: QOTD: Because an oversupply of computer chips

A is good, but one thing: there is a obsequies of events, but author uses Present perfect two times.
In my opinion it would be better if Past Perfect would be used for first event.

Because an oversupply of computer chips had sent prices plunging, the manufacturer has announced that it will cut production by closing its factories for two days a month.

Please somebody explain where I am wrong.
Thanks, BR

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