Go on google for inspiration
This reveal the importance of the past, so we as the reader can understand the things happening in the present. ( so if the answer is not right I tried my best to answer it)
The answer is B, ‘your’ should be our
—Evidence—
•] The sentence “...we learned how to make OUR stories more interesting..” sounds more fluent rather than it being “we learned how to make YOUR stories more interesting..” that sounds not as smooth as the first option.
•] Therefore it’s option B.