which sentence is an example of reflection

A.moving across country and starting over at a new school has taught me that challenges we are faced with in life makes us stronger
B.i look forward to the summer because it meant that i would that i would spend a relaxing week with my grandparents at their house by the lake
C.the floorboards creaked beneath my feet as i tiptoed through the kitchen hoping no one would hear me trying to make my way to the front door
D."i cannot belive it! what did i do to deserve this? a blizzard on my 16th birthday? now no one will be able to come to my party!"

A. moving across country and starting over at a new school has taught me that challenges we are faced with in life makes us stronger