B. It is necessary to make choices in life.
Note that as a traveler, one is trying to get somewhere and that they must continue to travel no matter what, as the road signifies their life, and the branching of the road signifies their choices in life.
Note: "And sorry I could not travel both
, And be one traveler, long I stood"
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Now there are many choices in life, and one can choose to follow the footsteps of others, or set off by one self.
Note: Two roads diverged in a wood, and I—
I took the one less traveled by,
And that has made all the difference.
"
In this case, the main character decided that he wanted to set off on his own and try to change the way he lived his life, in cutting out his own path, and doing what he likes. "..And that has made all the difference.
"
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These quotes show that B. It is necessary to make choices in life, as without making a choice, one will be stuck in where they are, and cannot move on in life.
hope this helps