Read the following context and choose the best option to answer the question.
Context: He was also giving the first groomer a hard time by asking why I waited until today to call . Here 's why : Treatment done Friday . Saw bugs that night . Waited through Saturday to give it 24 hours .
Question: Why did they wait so long to call the groomer ?
Options: 
A. They wanted to wait before getting the bugs removed .
B. They wanted the groomer to do the treatment .
C. None of the above choices .
D. They wanted to make sure the bugs were gone .


D