Answer:
A) The smallest amount of a stimulus that a person can reliably detect
Step-by-step explanation:
Absolute threshold can be define as the ability of a person to sense or detect stimulus.
Example an individual may be a able to detect stimulus at a lower level.
Absolute threshold can enables someone to detect or sense the difference between when there are stimulus available and when there are non available stimulus .
Absolute threshold is vital because it makes it possible for a person to detect stimulus either through sound , touch, taste and smell which are the human sense which is why it is called ABSOLUTE THRESHOLD.