This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
J.S. Quickfill is 
Select and explain. 
A. The original engine driven Mcspadden's compactor with guttapercha already coated, B. Like thermafill another obturator, C. No different than original Mcspadden's compacter, D. Chemically softened gutta-percha
A: The original engine driven Mcspadden's compactor with guttapercha already coated
Answer: A: The original engine driven Mcspadden's compactor with guttapercha already coated 
Explanation: None