Q: In this task, you will be given a short story. One sentence from the story is chosen. Consider the likely emotions of the participants in the sentence and those affected by it. Is any of these emotions caused by the sentence? You should write your answer in the form " A >Causes> B". Try to use phrases and sentences from the story to compose your answer when possible. For the sentence describing the result, you must use the verb feel(s).
story: Darrel was helping his brother with his homework. His brother didn't understand what Darrel was showing him. They decided to take a break. Darrel tried to explain the problem again. His brother understood much better after he had rested.
 selected sentence: His brother didn't understand what Darrel was showing him.
A:
His brother doesn't understand what Darrell is showing him >Causes> His brother feel(s) perplexed