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
[{'content': 'Direct procedure for fabrication of provisional restoration has a prime disadvantage of \nSelect and explain. \nA. Low strength, B. Time consuming, C. Tissue trauma, D. Difficult in retrieval', 'role': 'user'}, {'content': 'Answer: C \nExplanation: However, the direct technique has significant disadvantages: potential tissue trauma from the polymerizing resin and inherently poorer marginal fit.', 'role': 'assistant'}]