Answer:
B. Behavioral and Cognitive psychology.
Step-by-step explanation:
These are the two branches of Contemporary Psychology that lays its sole emphasis to understand human behavior both internally and externally. The Behavioral branch focuses on the observable behaviors while the Cognitive branch aims towards mental processes like thinking, decision making and problem solving. Both the branches are significant to add breadth to the modern psychology as they assist to understand the human behaviors more closely and deeply and thus, interpret and draw conclusions consequently and hence, more effectively.