ANSWER: (C) COGNITIVE PSYCHOLOGY
EXPLANATION: COGNITIVE PSYCHOLOGY is a branch of psychology that deals with mental processes or engagements (such as creativity, language use, perception, memory, attention, problem solving, and thinking abilities).
Furthermore, cognitive psychology focuses on the way people receive information and how this information are process to produce an output (responses).
Thus, Marie is practicing cognitive psychology, because she deals with the mental reaction of information processing of a targeted consumers.