Hello,
The correct answer is C) Jonas Salk created a vaccine that has nearly eliminated the disease in the United States and many other developed countries.
Hope this helps!!!!
both/and, either/or, neither/nor, not/but, not only/but also
First one is C! Because it explains what’s wrong with the lack of fast food in not populated areas. Second one is B! Because they cannot afford much therefore it’ll have a bad outcome. The last one I was a little confused on but It’s likely A.
0.4 and 40% percent are the same thing but if you want a specific one I'd go for 40%
