Compensatory equalization refers to the treat to internal validity brought on when $\_\_\_\_\_.$

Question $9$Select one:

a$.$

people in the experimental group communicate the treatment with people in the control group

b$.$

researchers compensate the control group as a sort of consolation for not receiving a desirable treatment

c$.$

competition arises between the groups

d$.$

control group members resent being deprived of a desirable treatment

e$.$

an unusual event occurs when one group, but not both are participating in the study