Answer:
cognitive
Explanation:
According to cognitive theory the mental processes that occur in the mind shapes the behavior of an organism. The behavior is not seen as the complete result as a reaction to the stimulus but the intermediate mental processes plays a part in the behavior.
Sierra, is not satisfied with her self image and downplays her achievements which leads her to be depressed. Her mental state is not caused as a reaction to a stimulus. So, this perspective is in line with the cognitive theory.
The scientific method involves hypotheses and research. C
The most powerful person (politically, not economically) in Germany now is its Chancellor (it is always the Chancellor), who at the moment is Angela Merkel. Merker is the head of the German government which is responsible for most of the functions of the country (but not for making laws).
True, Alexander helped spread Greek culture, ideas, etc.
Hope this helps!! (If not sorry!)