Whose woods these are I think I know. His house is in the village, though; He will not see me stopping here To watch his woods fill up with snow. My little horse must think it's queer To stop without a farmhouse near Between the woods and frozen lake The darkest evening of the year. He gives his harness bells a shake To ask if there's some mistake. The only other sound's the sweep Of easy wind and downy flake. The woods are lovely, dark, and deep, But I have promises to keep, And miles to go before I sleep, And miles to go before I sleep. Which is the best explanation of what the phrase “miles to go before I sleep” symbolizes in Frost’s poem? A. age; The speaker is aware of running out of time at the end of his life. B. future; The speaker has a need to keep moving and experiencing life. C. hardship; The speaker has too many problems to overcome in life. D. regrets; The speaker is sorry for mistakes he has made in life.