The way animals or creatures change and adapt over time
The correct answer is B.
There's no statically significant association between the exposure and the disease. The risk ratio does not follow the normal distribution, even it does not depend on sample size in comparison groups. The natural rr is approximately normally distributed and is used to produce confidence interval which is for the relative risk.
Polysaccharides have 1 sugar
disaccharides have 2 sugars
monosaccharides have a chain of sugars
