Answer:
To keep track of how well he was doing.
Explanation:
'The Autobiography of Benjamin Franklin' is an unfinished autobiographical account of life of Benjamin Franklin.
In Section 9, of his memor, he writes that at this point of his life, he conceived a thought of arriving at 'Moral Perfection'. To attain 'moral perfecrtion' Franklin came up with an idea to make a chart in his book, giving thirteen pages to this task. Thirteen pages for thirteen virtues, givin a weeks time to each virtue.
He made a chart for each virtue to keep a record of how well he is doing in accomplishing his goal to attain 'Moral Perfection.' Everytime he failed, he marked the bx with black color.
Therefore, option A is correct.
