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
During which stage of tooth formation the size of the tooth is determined? 
Select and explain. 
A. Apposition, B. Histodifferentiation, C. Morpho differentiation, D. Calcification
C: Morpho differentiation
Answer: C: Morpho differentiation 
Explanation: Morphodifferentiation establishes the morphologic pattern, or basic form and relative size of future tooth.