But ... The Tedster LOVED it when we brought out his special doggy birthday cake . He could n't get enough ! Grandma came over and a few friends and we sang him happy birthday . It was lovely .
According to the above context, choose the best option to answer the following question.
Question: Whose birthday was the narrator celebrating ?
Options:
- They were celebrating their birthday .
 - They were celebrating a puppy 's birthday .
 - They were celebrating a cat 's birthday .
 - They were celebrating their Grandma 's birthday .


They were celebrating a puppy 's birthday .