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
Finishing and Polishing of Amalgam make the restoration: 
Select and explain. 
A. Increase in tarnish and corrosion resistance, B. Increase the marginal strength, C. Decrease the tarnish and corrosion resistance, D. Increased compressive strength
A: Increase in tarnish and corrosion resistance
Answer: A: Increase in tarnish and corrosion resistance 
Explanation: None