C because of the apostrophe after the s which indicated that they both participated
It can expand your life span
Other ppl would start becoming more positive
They should be taught to cook for wealthy families.
Hope thats right :/
Tone is the author's attitude toward the speech. Since we know that Dr. King was the author and presenter of the speech, this was one of inspiration, seriousness, hope, and encouraging. This is not to be confused with mood. Mood is your feelings from the text. So, while the tone may be one of hope, to say it was 'hopeful' would be a mood (if that is indeed what you are feeling when hearing it.)
A newer school new teaching system or something like that