Answer: Sarcasm is the use of irony to mock or convey contempt.
Answer:
It depends on the relationship between each family member and how old his siblings are. if they are still like toddlers, well then they can't help obviously. Also who is Mitchell? A relative, a friend, a lover? that is also an important thing to note. I would either pick him or his father.
The Answer is: It is their only way out.
"Yes," replied the Professor, looking at me calmly from under his spectacles, "it is the only chance which remains to us of ever escaping from the interior of the earth to the light of day."