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: Physiology
The increase in threshold of a receptor when a series of stimuli of subthreshold intensity are applied in succession is called as__________ 
Select and explain. 
A. Adaptation, B. Initiation, C. Accommodation, D. Resistance
C: Accommodation
Answer: C: Accommodation 
Explanation: None