The most foolproof way of testing the true effectiveness of a newly introduced method of psychological therapy is by means of
a. survey research.
b. case study research.
c. naturalistic observation.
d. correlational research.
e. experimental research.

"choosing is refusing" means individuals face an opportunity cost with each decision they make. economists state that every decision involves trade-offs. opportunity cost is the least desirable alternative given up as a result of a decision.

if you are on the computer you can not take a picture but you can upload one but i am not sure about phones but i'm pretty sure it's the but to upload one just click the paper clip looking thing/ link thingy thing and upload a pic

i think it's the cabinet

answer; preconventional;