I think the first quote best develops the central idea that African Americans have been intentionally block from voting in election.
"Every device of which human ingenuity is capable, has been used to deny this right."
Meaning that every device humans have have been used to deny the right to vote in elections.
The answer is B. Because, if the students had the flu, of course their absence was 'legitimate', which means 'acceptable', allowed. And 'aberration' means 'something unusual or unexpected", because they usually have perfect attendance, but now they missed a couple of classes.
It all depends on ur personality , either way is fine
