The sentence in which the narrator acknowledges those who disagree with her main argument is "If we step away for a time, we are not, as many may think and..."
After reading the answer choices, we can infer that the narrator's main argument concerns the advantages of taking some time for oneself, away from other people. In one of those choices, the narrator actually acknowledges those who disagree with that argument, saying:
In that sentence, the narrator shows that she knows some people will disagree with her by saying that taking some time for oneself means being irresponsible. She addresses such accusation by rebutting that it is quite the contrary - stepping away for some time means preparing oneself to perform better.
With the information above in mind, we can conclude that the correct answer is option B.
Learn more about main arguments here:
https://brainly.com/question/26181316
#SPJ1