Read the text trailer about The Miracle Worker. When Annie Sullivan is sent to work for the Keller family, she has no idea what she will encounter or what to expect. She knows little about the young child Helen, save the fact that she is deaf, blind, and mute. Barely an adult herself, Annie wonders how she will reach Helen or if there is, indeed, anything to be reached. Will Annie discover Helen, herself, or both in her latest teaching assignment?

Which adjective best describes the tone of this text trailer?

playful
mournful
formal
informal
HELP!