Final answer:
While the main themes cannot be fully determined without the full poem, the themes and corresponding quotes provided suggest issues facing immigrants (a) and (e) are central, with a possible resigned tone due to the repetition of 'some'. The speaker's point of view evolves to reflect the narrative's emotional and experiential depth.
Step-by-step explanation:
To answer the student's literature question, it is important to closely analyze the provided quotes and themes to best determine which options align with the main themes of the poem. Without access to the full poem, we cannot definitively answer which two sentences best describe its main themes. However, judging from the quotes provided, one might infer themes related to the harsh experiences of immigrants (a) and misplaced optimism about starting anew in a new place (e). If these are correct, the corresponding quotes that best support these themes would be (a) "The old men who have lived here stare at us / from deep disturbed eyes" (Lines 16-17) and (e) "others will go on living / without a soul, a future, or a reason to live." (Lines 63-64), as these lines reflect the loss of humanity and the futile hope for a better life, respectively.
The impact of the repetition of the word "some" in the poem could suggest a resigned tone (c), as it may reflect the speaker's view that the outcomes for different individuals are varied yet generally bleak. The evolution of the speaker's point of view from the second to the fifth stanza suggests a shift from narrative to interrogative, to lyrical and introspective, and finally to a direct address, indicating the dynamic nature of the poem's narrative voice.
Themes of immigration, struggle, and identity can be inferred from the mention of working as a dishwasher and field hand, as well as the evolution in the speaker's point of view, reflecting both personal and collective experiences of immigrants.