Read the following context and choose the best option to answer the question.
Context: DENTIST : We ca n't take it out while it 's infected . ME : Actually , while it 's infected is exactly the time you should be taking it out ! If it was n't infected , I 'd be willing to keep it !
Question: Why ca n't the tooth be extracted ?
Options: 
A. Because the tooth is infected .
B. Because the tooth is impacted .
C. Because the tooth is healthy .
D. Because the tooth is not infected .


A