Although Marcie and her husband were unsure of whether or not it was a good idea, they decided to get a little spaniel puppy for their children. When the puppy first arrived at the Wilson's home. Even the kids were a little uncertain about how to interact with it. Though after a few hours, the kids and the puppy were tumbling around on the floor wrestling and laughing. Marcie and her husband knew they'd made a good decision.

Which of these is a sentence fragment?
A) When the puppy first arrived at the Wilson's home.
B) Marcie and her husband knew they'd made a good decision.
C) They decided to get a little spaniel puppy for their children.
D) Even the kids were a little uncertain about how to interact with it.