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
Objective symptoms are determined by: 
Select and explain. 
A. Visual and tactile inspection., B. Percussion., C. Palpation., D. All of the above.
D: All of the above.
Answer: D: All of the above. 
Explanation: Objective symptoms are determined by tests and observations performed by the clinician. These tests are as follows:

Visual and tactile inspection
Percussion
Palpation
Mobility and depressibility
Bite test
Radiograph
Electric pulp test
Thermal tests (hot and cold)
Anesthetic test
Test cavity