Answer:
A) her escape from the White House during the war of 1812.
Explanation:
I summarized her letter and put the essential lines below. She is leaving the White House but not leaving the valuable portrait.
1. The good Mr. Carroll has arrived to hurry my departure, but I refuse to leave until the huge painting of General Washington is secured, and it must be unscrewed from the wall.
2. Because this procedure was deemed too time-consuming for these critical periods, I have directed that the frame be broken and the canvas be removed.
3. It has been completed! and the priceless portrait was entrusted to the care of two distinguished gentlemen from New York for safekeeping.
4. And now, my sister, I must leave this house, lest the retreating army captures me and imprison me thereby filling up the path I have been ordered to follow.
5. I have no idea when I will write to you again, or where I will be the next day!