It will be leyter B. (2) Lucy spread a tablecloth in the grass beside the millpond it was a pretty day for a picnic.
Formal.
As far as I know, there is no such thing as either standard or practiced diction. Informal is the way you communicate with your friends, for instance, which is not how you would write a thesis paper, legal document, etc.
Answer: You should put things that you like to do but if it is something like watching anime you should not say that but say things that you are comforable saying.
I’m not 100% sure what you’re trying to say here, but I believe the answer is d.