You don't need to worry about labeling yourself if it's stressing you out this much. You of course can try to figure it out, but you really don't need to label yourself.
(I'm really sorry if this comes off as insensitive, I'll help more if you need it <3)
Memoirs are those writings by a person about his/ her own life experiences. It may or may not have a historical importance, but most of the memoirs like Elie Weisel's "Night" serves an important source of witness' accounts of the events that happened in the past.
Among the given sentences, the best example of a memoir is the chef writing "about his early cooking years in Germany and France". He himself is the writer, making it a personal account of his earlier days. Also, he wrote about his days as a young chef, writing about his experiences so as to provide an insight into what his life was before. The first option is not about the personal account of the king, the second being a student's personal views which are not valid for a memoir or anything memorable. The last option is a personal account but about an unimportant topic, a detailed description of bikes and their parts which cannot be deemed a memoir.
"Although it was raining fairly hard the Team still played its best game ever. " I think that could be the answer- but I'm not 100% sure :') hope this helped.
