Overall, leisure activities with friends ____ in the course of the twenties as emerging individuals transition into young and middle adulthood

Mrs. Bourdeau is an American woman living in the United States who is widowed, and has a married son and a married daughter. If she becomes ill, she is likely to be cared for by ___________________

a. her best friend, who is also a widow b. her oldest child c. her son and daughter equally d. her daughter or daughter-in-law

Food for a hungry rat is an example of a(n) ________ reinforcer

Fill in the blank with the appropriate word.