A snack manufacturer finds that it must increase the salt content of its chips by 8 percent in order for a sample of consumers to notice that the chips are saltier than they were before. This example best illustrates the concept of a(n) threshold.
a) absolute threshold
b) just noticeable difference
c) difference threshold
d) difference threshold, or just noticeable difference

d) difference threshold, or just noticeable difference

Explanation:The difference threshold, which is also referred to as the just noticeable difference (jnd), is the least difference that we are able to detect half the time. Half of the time you will be able to notice this slight difference in salt and this doesn't happen 100%of the time because it just a slight difference .

probably 3 since archeologists and historians don’t understand there writing.