Answer:
Hi!
The answer you are looking for is option B. Surja knows that a young woman without family to protect her is vulnerable; she believes that a marriage to Tara would benefit everyone.
Step-by-step explanation:
Surja accepts the responsibility because she acknowledges that in her world, a young woman without a family is vulnerable. Tara needs approval from Surja in order to marry, and he has not married because Tara has not found a woman that Surja will approve as a wife. Surja wants Tara to marry a woman from his own social class, or caste, Kaystha to benefit everyone.