I think a small continent with many countries
Negative campaign tone : Campaign which usually using negativity and criticism towards other campaign candidate
Starting from 1988, the graphs shows that American citizen will be more likely to abstain from the voting the more negative the campaign tone are.
this means that the voter turnout will be higher if the negative campaign tone increased
I Believe the answer is: Strong
An argument could be considered as storng if the data at hand show strong correlation between the argument and the fact on field.
In this case, the <span> strong correlation between execution of criminals and the decrease in number of serious criminal behavior would support the argument that favor death penalty.</span>