The correct answer is Unhappy, because it did not work as expected?.The word Discourage means having lost confidence or enthusiasm; disheartened.Ex: He must be feeling pretty discouraged.?The word 'Unhappy' is the closest word to the word 'discourage'.Let's look at the meaning and examples of the given words: Words/phraseMeaningExamplePleasedFeeling pleasurable satisfaction over somethingpleased their child.ImpressHave an emotional or cognitive impact uponThis child impressed me as unusually mature.FrightenedMade afraidThe frightened child cowered in the corner. Therefore, by reading the above explanation we find that the correct answer is Option 1.