The correct answer is 'c'
When they see something that look familiar, or smell something like food, and when they see some familiar face.
Like if you are in the park playing soccer, and you see some familiar dog that belong to you long time ago.
These lines demonstrate the political activism of his poetry because it goes to show his perspective on America, while also protesting against American racism which was almost at its peak at the time he wrote this poem
One of my favourite k-drama is 365: Repeat the Year