Answer:
A.the disign is very human it can kill you 100%
Explanation:
GRAPE
<span>Well, they were angry over the Civil War, and some people in the north thought that the entire south should be punished, because of the war. There were also the carpetbaggers who came to the south to try and profit from the destruction and mayhem, and generally being a nuisance to those trying to rebuild destroyed communities. An important role was played also by missionaries who were coming to the south to try and help them rebuild, of which both made the southerners angry because they just wanted to be left alone after their defeat to lick their wounds, try and rebuild, and get life back to normal.</span>
The proper answer in your case is D ok by
The answer to this question is <span>Longitudinal Study
The main purpose of this type of study is to find out whether a certain variable will give different response if the time factor is change.
Examples of this time of study would be: a sudy to find out how long it need for a certain viruss to develop if it got injected since early age.</span>