Answer:
I hope this will help you
Mom:Why do you stay so late?
Son:It was a lot of works in the office ,mom.
Mom:I don't want to hear you excuse .
Son:But,mom!
Mom:Ok first you go and take a bath,I can take the food .
Son:Ok,mom.
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."
To be completely honest with you I really don’t know