In which type of study are the effects of age and the effects of time of measurement confounded with one another?

Your dog Scooter and cat Pockets have the disturbing habit of tormenting each

other. With much patience - and a rolled-up copy of Rolling Stone - you teach them to sit nicely together in a beanbag chair. After a long weekend away, you come home to find them pawing and clawing at each other, until they notice you. Then they run and sit harmlessly in the beanbag chair. This suggests (a) generalization from one situation to another (b) the extinction was incomplete (c) the punishment fully extinguished the response that was punished (d) punishment may not suppress the response unless the punisher is around

People in their middle years feel a(n) ______ commitment to and responsibility for others,and are ______ comfortable in interpersonal relationships

a. decreasing; less c. increasing; less b. decreasing; more d. increasing; more