Sandra thinks that smiling a lot during a job interview increases a person's chances of getting a job offer. the main difference between sandra's folk theory and social psychological theories is that social psychological theories are

The difference between Sandra’s folk theory and the psychological theories is that compared to her folk theory, psychological theories are likely to be put to the test, in which it is to be tested and experimented, in order for it to be considered reliable unlike Sandra’s theory which doesn't hold any proof that it is valid or reliable.

a is the answer because it just is

do all equestions have to be answered