Some of the Following Sentences Are Good Topic Sentences for a Narrative

Some of the following sentences are good topic sentences for a narrative. Some are too big to develop in one paragraph or are too narrow to be developed. Some make no specific point. Place an X beside good topic sentences.
-a. ____ I learned to be responsible during the six years I spent in New York.
b. ____ My mother demonstrated true strength when our house was destroyed in a fire.
c. ____ The care that I received at the hospital after my accident eliminated my mistrust of doctors.
d. ____ Roberto decided to work during summer vacation.
e. ____ Two men were charged with the crime.
f. ____ Graduating from high school was the happiest moment of my life.
g. ____ My dad had a tough childhood.
h. ____ Mike was extremely frightened during his first rollercoaster ride.
i. ____ My family went on a road trip every summer, and each one was a disaster.
j. ____ My first day at my new job taught me the importance of teamwork.