I think that it is a but im not sure of that so dont be dependant on my anwser
Secondhand smoke contains more than 7,000 chemicals. Hundreds are toxic and about 70 can cause cancer. ... Secondhand smoke causes numerous health problems in infants and children, including more frequent and severe asthma attacks, respiratory infections, ear infections, and sudden infant death syndrome (SIDS).
I think the anwser is letter b
Answer:
The correct answer is 70%.
Explanation:
Eating disorder or binge eating is a psychological problem however anorexia nervosa an eating disorder runs in families too. It indicates that it has something to do with genetic or intercity component. Recent researchers have found 2 genes involved in determining the chances of acquiring the eating disease. It suggests that genes have also an important role in such cases. Research on twins found that 70% chances to develop the case in other twin.
Thus, the correct answer is 70%.
