'Bluetooth' is named after?
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Blue Whale
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Harald Blatand
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Harold Bleacher
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Bluetooth
To answer this question, the user needs to know the origin of the name "Bluetooth".
Option A, Blue Whale, is incorrect. The name Bluetooth is not derived from a blue whale.
Option B, Harald Blatand, is correct. Bluetooth technology is named after Harald Blatand, who was a 10th-century king in Denmark. Blatand means "Bluetooth" in English, and he was known for his ability to unite different tribes and nations, just as Bluetooth technology allows different devices to communicate with each other.
Option C, Harold Bleacher, is incorrect. The name Bluetooth does not have anything to do with Harold Bleacher.
Option D, Bluetooth, is incorrect. Bluetooth technology is not named after itself.
Therefore, the answer is: B. Harald Blatand.
Bluetooth wireless technology is named after Harald 'Bluetooth' Gormsson (Harald Blåtand), a 10th-century Danish king known for uniting disparate Danish tribes into a single kingdom — a nod to the technology's goal of unifying communication protocols/devices. The Bluetooth logo itself is a bind rune combining the Younger Futhark runes for his initials H and B. 'Blue Whale' and 'Harold Bleacher' are not real historical or etymological connections — they appear to be distractors/misspellings. 'Bluetooth' as an answer would be circular (naming the tech after itself), so it doesn't answer 'named after' meaningfully.