19. 다음 글에 드러난 Rachel의 심경 변화로 가장 적절한 것은?
Rachel loved watching birds in the woods. However, she was confined to the house because of a broken leg. She turned on the TV but nothing was interesting. She tried to read a book but it was not fun at all. All she could do was sit, look at her broken leg, and watch the clock. As she was listening to the dull tick-tock of the clock, her phone vibrated. It was a message with an audio file from her dad. As she opened it, a huge smile spread across her face. Her dad had sent a recording of a little wren’s song ― her favorite bird song. Listening to the bright warm sounds lifted her spirits and made her day more pleasant.
* wren: 굴뚝새