It is a good idea because it helps to detect if there is too much carbon monoxide in the house. If there is too much, it can be poisonous and the detector will let you know. this answer would be TO AVOID POISONING BY A BUILDUP OF CO GAS.
btw, is this platoweb? just curious.
Answer:
Broccoli.
Brussels sprouts.
Cabbage.
Cauliflower.
are 4 cruciferous vegetables.
but may i see your opentions?
Answer: Olivia is addicted to drug because her parents were diagnosed with drug
Explanation:
Olivia parents had the similar problems like Olivia have, her parents were drug diagnosed and addiction. As every child is very similar to parents and her parents habit was to drunk and Olivia has the same habit as her parents does.
The answer is (C) Melatonin