The following data have been collected for four different cost items. 
Which of the following classifications of these cost items by cost behavior is correct?
Definitions:
dB
A unit of measurement used to express the magnitude of sound pressure or electrical power on a logarithmic scale.
Intensity
The degree of strength, force, or concentration applied in a particular action or by a particular phenomenon, such as light, sound, or physical exercise.
Swimmer's Ear
An infection of the outer ear canal, often caused by water remaining in the ear after swimming, providing a moist environment that aids bacteria growth.
Otosclerosis
A condition characterized by abnormal bone growth in the middle ear, leading to hearing loss.
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