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naotatilover
naotatilover naotatilover
  • 10-04-2016
  • Health
Answered

________ of secondhand smoke can be harmful.

AEven low levels
BOnly high levels
CNeither of the above
DBoth A and B

Verified Answer :

SarahNicole SarahNicole
  • 10-04-2016

well really, it could not be both A and B, as option B contains the world 'Only' which means it can not (depending on the context) be put with other options, so that rules D out, low levels of second hand smoke can still be harmful, it is even listed on the National Cancer Institute

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