Final answer:
The passage has a solemnly reverent tone toward the migrant workers and a critical view of the owners.
Step-by-step explanation:
The tone in the provided passage conveys a sense of deep sympathy and a solemnly reverent attitude towards the migrant workers. It reveals an understanding of the hardships and struggles faced by the poor, along with a wish for their conditions to improve. The tone is also implicitly critical of the associations of owners, who seem indifferent to the plight of the workers. Given these observations, the correct answer would be option B, Solemnly reverent tone toward the migrant workers.