Correct answer: (d) 1, 2 and 3
Explanation
- A
1 only
(a) 1 only. Wearables also monitor sleep and can assist hearing. Dropping 2 and 3 is not the key.
- B
2 and 3 only
(b) 2 and 3 only. Location identification (GPS watches, fitness bands) is also a core wearable task. Dropping 1 is not the key.
- C
3 only
(c) 3 only. Hearing assistance is only one of the three listed tasks. Not the key.
- D
1, 2 and 3
(d) 1, 2 and 3. Wearable devices can locate a person, log sleep, and assist the hearing-impaired (connected hearing aids, cochlear processors, haptic alerts). All three are accomplished. Official key.
Summary. Official key is (d). Wearables are body-worn computers: GPS and beacons for location, accelerometers and heart-rate sensors for sleep, and hearing-aid class devices for the hearing-impaired. None of the three tasks is outside the category. Honour (d).
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