I’m pretty sure it’s C if not A
Difference threshold is a minimum alteration in sensory intensity that is noticeable to an observer and can be coded into neural messages. Different threshold is the lowest level of encouragement that is essential to sense that a modification has happened the difference in the intensity between two stimuli that is necessary to yield a just notable difference also known as JND. The just notable difference depends not only on the intensity of the new stimulus but also on the level of stimulation already present which is the more intense the existing stimulus the larger the change must be to be noticeable.
The primary<span> motor </span>cortex<span> (Brodmann area 4) is a brain region that in humans is located in the dorsal portion of the frontal lobe.</span>
