104k views
5 votes
________ of secondhand smoke can be harmful.

a. Even low levels
b. Only high levels
c. Neither of the above
d. Both A and B

1 Answer

0 votes
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 
User Lydon
by
8.0k points