a) Hazard avoidance
b) Damage limitation
c) Hazard detection
d) Hazard detection and removal
Answer: d
Explanation: The system is designed so that hazards are detected and removed before they result in an accident.
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l=list(‘HELLO’)
p=l[0], l[-1], l[1:3]
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‘%x %d’ %(255, 255)
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