Read the excerpt below and answer the question.

For I am at my destination: Another garden.
Where the unpebbled walk awaits tomorrow's footprints.

In the above excerpt from the poem, the phrase "the unpebbled walk awaits tomorrow's footprints" refers to ________.

the difficulties Chang experienced in America
Chang's feelings about his new life
Chang's feeling of loss at leaving his childhood garden
memories of Chang's home in China