Answer:
C) increase.
Step-by-step explanation:
Correlation: In psychological research, the term correlation is described as a phenomenon that determines the "relationship" between two or more than two variables yet this relationship doesn't implicit specific cause and effect. Therefore, when two different variables are being correlated, it signifies that changes in one variable will cause a direct change in the other variable as well.
In the question above, as the client becomes fully functioning after attending various psychotherapy sessions means that he is reaching out the goals he or she wanted, then we can expect that the correlation between the real and the ideal self is increasing.