I believe it will be Africa.
I would have to say the answer is C.
A is incorrect since hydrogen is not an air pollutant.
B is incorrect because ozone is most definitely one of the top.
And D has cyanide which is a chemical for suicide during wars.
Hope this helps!
<span>The answer is C because fad diets are typically not successful for long-term weight loss and they can have bad effects on your health. Nutritionalists generally advise that a longer, slower dietary plan is healthier. </span>
Answer:
A. fertility awareness
Explanation:
Birth control pills alternate a person's hormonal systems to prevent an egg from being dropped and fertilized, and a condom prevents the sperm from reaching the egg. Fertility awareness is the only one that does neither. It is a method that allows a woman to chart the fertility signs her body produces over the course of a menstrual cycle.
hope this helps!
