Read the following context and choose the best option to answer the question.
Context: Such a big girl ! She brought an outfit Grandma got her as well as this cute little set mom brought . We surprised mom by getting her in on the session just for a few quick shots . these are always fun because it is unexpected and the kids love it .
Question: Why did Grandma buy her the new outfit ?
Options: 
- She wanted to have her grandkid surprise her mother .
 - She did n't trust the mother to buy good clothes .
 - She knew the mother could afford new clothes .
 - She was donating clothes .


She wanted to have her grandkid surprise her mother .