Which of the following is a cause of the changing role of women in american society over the past several decades?

a. new technologies that have reduced the amount of time required to complete routine household tasks

b. improved birth control

c. changing political and social attitudes

d. all of the above are correct.

In e. c. tolman's experiment, some rats were trained to run through mazes for standard food goals, while other rats were allowed to explore the mazes for 10 days without food goals or other rewards. later, when food rewards were placed in a box at the far end of the maze, the previously unrewarded rats reached the food box as quickly as the rewarded rats after only one or two trials. this experiment demonstrated that the rats had the ability to form of their surroundings.