Which of the following statements about voting machines is true?

a. they do away with the need for manual vote counting.

b. they increase the number of people needed to administer elections.

c. they slow down the voting process.

d. they increase the risk of counting errors.

The answer is A... I mean if you think about it, them you can just figure this out with the process of elimination. :)
They obviously don't ENCREASE the risk of counting errors.
They don't SLOW DOWN the voting process.
And there would be absolutely no reason for the machine to increase the number of people NEEDED to administer elections.
The only answer that makes sense, is that the machines made it to where manual vote counting was not necessarily needed. :)