Answer:
The author’s voice is confident and authoritative. The phrase “we can be sure that we have only to persevere to conquer” exemplifies this voice.
Explanation:
The author's voice is
The phrase
This refers to the kind of tone where the speaker is assured and composed because he knows what he wants.
With this in mind, we can see that the best way to complete the given sentences are shown as being confident and authoritative tone and teh phrase exemplifies the voice.
This is because, from the complete text, there is the narration of the author being confident as he uses phrases such as "I am assured..." that displays his conviction.
Read more about tone here:
https://brainly.com/question/15447799
