Question

Which sentence uses punctuation correctly?

a. The teenagers played football, after the rain stopped.
b. After the rain stopped, the teenagers played football.
c. After the rain stopped the teenagers played football.
d. The teenagers played football after, the rain stopped.

Answer 1

b. After the rain stopped, the teenagers played football.

Answer 2

The sentence with the correct punctuation is B) After the rain stopped, the teenagers played football.
Since you decided to introduce inversion into your sentence (putting the subordinate sentence - After the rain stopped - first, before the main sentence), it needs to be followed by a comma.