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
Advantages of light activated composite resins are: 
Select and explain. 
A. Extended working time, B. Reduced resistance to wear or abrasion, C. Better resistance to wear or abrasion, D. All of the above
A: Extended working time
Answer: A: Extended working time 
Explanation: None