You and Your Visually-Impaired Mother, Whom You Love Dearly, Are

You and your visually-impaired mother, whom you love dearly, are attending a lecture by a scientist who is conducting groundbreaking research on a vaccine for AIDS when a fire breaks out in the lecture hall. A beam falls, trapping your mother, her seeing eye dog, and the scientist. You have time to save only one of them. A care ethicist would most likely advise you to:

A) save the scientist; she is more likely to benefit society through her research.
B) save your mother; your relationship with her creates a special obligation to her.
C) save the dog; to give preferential treatment to humans in this case is speciesist.
D) apply the doctrine of the mean and take each of them partway out of the building.