I took them by myself - this is the first time I have really gone anywhere with both of them by myself . It went okay , except that at the end of the appointment I forgot to wait for them to come in to do the vaccinations . I got down to the car , got them in their seats , called Jennifer to arrange dropping off Finn , and then realized they had n't had their shots .

pick from the following.
[A]. They drove away and forgot about them .
[B]. None of the above choices .
[C]. The kids were brought back into the office .
[D]. They brought them back in at a later time .
Answer the following question: What may have happened next ?
[C].