Read the following paragraph and answer the question. Give ONLY the answer, no other words or explanation.

For example:

Answer: <most likely answer, as short as possible>.

Paragraph: As if it was n't hard enough just being away from them , I was also dealing with my father and everything that revolved around his cancer diagnosis and treatment . In an ideal situation I would have simply arranged to bring him back to Chicago for that . Unfortunately , my father was a stubborn man and set in his ways , and he was n't leaving his home and friends .

Question: What may be the reason for not forcing their father to go to Chicago ?
They want to respect his wishes .
The father is stubborn and unwilling to leave his home and friends.