Read the following excerpt from t. s. eliot's "the love song of j. alfredo prufrock",

let us go then, you and i,
when the evening is spread out against the sky
like a patient etherized upon a table;
let us go, through certain half-deserted streets,
the muttering retreats
of restless nights in one-night cheap hotels
and sawdust restaurants with oyster-shells:
streets that follow like a tedious argument
of insidious intent

what is one purpose of the symbolism used in this passage?

a. to make an oyster seem like a peer to the speaker
b. to portray an urban setting as a place of loneliness and isolation
c. to link two unlike concepts, an etherized patient and a table
d. to draw a connection between the speaker and the reader