Part A: The central idea of "Hope for Hannah" is likely:
C. The Industrial Revolution was a time of important change.
Part B: The sentence from the text that best supports this answer is:
C. It was the end of another 14 hours hunched over a sewing machine, and she closed her eyes and sighed with the knowledge that it would begin all over again tomorrow.
This sentence reflects the significant changes and challenges brought about by the Industrial Revolution, particularly in terms of labor and working conditions.