A) Let’s nicely playing
B) Let’s play nicely
C) Nicely play
D) None of these
🧠 Explanation:
The correct form is "Let's play nicely", where "nicely" is an adverb describing how to play.
It encourages polite, fair, or friendly behavior during an activity.
"Let’s" is a contraction of "let us", used to suggest doing something together.
This sentence is commonly used when guiding children or groups to behave kindly while playing.