Answer:
B.
The tone is best described as hopeful, as President Obama recalls the successes
made in the U.S. as it recovers and how it will further prosper in the future.
Step-by-step explanation:
From President Obama's State Of Union address, the tone of his speech is best described as hopeful as he recounts the various successes the US has made and how it will recover from some unpleasant situations such as gun related deaths, etc and how he hopes for further prosperity in the future.