The answer is d. Because poems aren't made to have you remember them. They are made so you can experience how the poet expresses themselves.
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Anwser is A to the question
Sauntering was different than "hiking" or rushing through life. Muir believed that sauntering through life, or slowly meandering through taking time to visit every thing in one's path, is the only way to appreciate the true beauty around us.
A person shouldn't measure life's worth by hiking (a metaphor for money and success) but rather by sauntering (a metaphor for beauty and love and friendship).
If you're asking if this is true or false, then it is true.