Final answer:
The information given does not provide Biswas's attitude towards the drought but describes Dorothy's initial indifference, which turns into compassion due to her sense of common humanity.
Step-by-step explanation:
The attitude that Biswas has towards the suffering during the drought is not explicitly mentioned in the information provided. However, it appears to be connected to a character named Dorothy, who exhibits a different behavior than the attitudes listed in the choices provided. Dorothy displays indifference initially, but she is conflicted by a sense of common humanity and a moral obligation, which leads her to consider the necessity of helping those in a worse situation than herself.
Given the context and the excerpt, we can infer that although Dorothy initially represents a form of indifference due to the commonality of the situation, she is ultimately compassionate. Therefore, even though the question pertains to Biswas, the information provided does not allow us to categorically determine Biswas's attitude, and it would be most accurate to respond based on the character of Dorothy instead.