When a car salesperson uses a social influence idea he learned in class to try to achieve a sale,this is an example of a(n) ______ intervention.

A) social
B) interpersonal
C) personal
D) efficacy

Of the following, the correlation coefficient that indicates the weakest relationship between the two variables being measured is

A) +0.95.
B) -0.69.
C) +0.01.
D) -4.50.