Tina negligently hits student Susie with her car. Which of the following is true?
a. Tina has no duty to come to the aid of Susie
b. Tina has a duty to come to the aid of Susie because she negligently hit her
c. Tina has a duty to come to the aid of Susie only if police are not on the scene within a reasonable amount of time
d. Tina has a duty to come to the aid of Susie only if Susie has on insurance
e. Tina has a duty to come to the aid of Susie only if no one else is willing to do so