B, have been stagnant in their numbers.
Answer:
The answer is B.
Explanation:
because I googled it lol. Anyways good luck
Observable behavior is to inner sensations
I'd say that the answer is observational study because they're just analyzing the data and if it were an experiment they'd be taking data and comparing it.
Answer:psychological trait theory
The Big Five personality traits is a suggested taxonomy, or grouping, for personality traits, developed from the 1980s onward in psychological trait theory.
Explanation: