B.) Garden
this is because "on" is one of many words that are commonly in prepositions. Then to find the object of the preposition, you have to ask yourself, "on {or insert whatever your word is here} what", because the object of your preposition is the subject of the preposition. :)
I hope that makes sense!
Answer:
D. No error
Explanation:
The sentence is correctly written and shown proper punctuation
I think any of these would be stronger but I would say executed.