How does voice affect the credibility of a text?

1.The voice affects consistency of tone and the amount of bias revealed.
2.A positive voice is more credible than a negative voice.
3.A negative voice is more credible than a positive voice.
4.The voice must express a similar personality to all potential readers.

Question

How does voice affect the credibility of a text?

1.The voice affects consistency of tone and the amount of bias revealed.
2.A positive voice is more credible than a negative voice.
3.A negative voice is more credible than a positive voice. 
4.The voice must express a similar personality to all potential readers.

anonymous · Answer

4.The voice must express a similar personality to all potential readers.

anonymous · Answer

naaahhhhhh

anonymous · Answer

i asked my teacher.......im pretty sure its right.....he agrees

anonymous · Answer

or its the first one im not sure