This question is really quite tricky. Please help me with the correct answer for this. I think it is A but I am not too sure. Thanks!

Drag and drop the nonrestrictive participial phrase into the box to complete the sentence.

The campers_______ savored their free time in the newly built pool.

A) ,laughing and splashing,
B) laughing and splashing
C) ,laughing and splashing
D) laughing and splashing,