Answer: challenging problems
Explanation:
Whatever completes the text would have be something that relates to the problems that are to be solved as this is the subject of the sentence and it would have to be in the negatives due to the use of the word "unfortunately".
The best option is therefore the above because too many challenging problems relates to the subject of problems and is not a good thing.
Reading titles and headings in order to get an overview of what lies ahead in a reading passage is called surveying.
The speaker's of the family flees to America.
Answer:
Wait what are you talking about is this a book, song, tv show, what?
Explanation:
He makes excuses and says he couldn't predict the problems that would arise.