Which of these refers to effects that weaken muscles?

When Stanley is afraid of meeting a woman, he finds an excuse to run off by himself. The immediate effect of running away is to make him feel less anxious and more at ease. Stanley's behavior illustrates the ____

a. role of negative reinforcers in avoidance behavior b. fact that shaping can result in maladjusted behavior c. role of partial reinforcement in abnormal behavior d. power of positive reinforcement

Techniques to increase the return rate for a survey include

A. preserving a sense of confidentiality by addressing the survey to no one in particular ("Dear occupant"). B. making sure the survey requires minimal effort from the respondents. C. making sure the respondents are not aware of the survey topic. D. all of these