Which of the following would be acceptable behaviour for a self$-$driving car in the event of an unavoidable crash under the principle of utilitarian benefits?

a$.$

injure two occupants of the vehicle to prevent injuring a squirrel on the road

b$.$

injure a pedestrian to prevent injuring the lone occupant of the vehicle

c$.$

injure a person in a wheelchair to prevent injuring the lone occupant of the vehicle

d$.$

injure the lone occupant of the vehicle to prevent colliding with a school bus