The correct answer is B. Approaching
Explanation:
The poem "Learning to Read" by Frances Ellen Watkins Harper explores the way after the Emancipation slaves aim at trying to read, although some white people tried to stop them. In the case of the excerpt presented the author describes the way she is told by others it is too late for her to learn to read but she believed as she "was rising sixty" she needed to take advantage of time and learn how to read. This means in this context "I was rising sixty" means the author is about to be sixty years old or that she is getting near or approaching to this age. Therefore, the meaning of the word rising is "approaching".
