Answer:
I'd say it's D (this might be wrong, I'm not 100% sure.)
Explanation:
The reason I think this is the story ends with a very motivational "I couldn't have done it without you guys" which shows Cindy appreciates her friends for helping her out when rain came and it was about to ruin her bake sale, when they had an idea to do the bake sale under some shelter.
A is not really a moral you can learn,
B isn't either, it isn't a good lesson you can learn
C is a good moral, but the story doesn't exactly convey that.
Please tell me if this is correct, hope it helped.
