The aggregate-demand (AD) curve shows that a decrease in the price level will result in an increase in real GDP, or gross domestic product. Thus, there would be a right/downward MOVEMENT on the curve. Note, I did not say shift but rather movement. Let me know if you have further questions.
I believe the answer is D. secure attachment.
It would be easy if you knew the difference between secure and insecure attachment: according to research, a child with insecure attachment will avoid or ignore the caregiver and a child with secure attachment feel protected by their caregiver.
If Sandra clings onto her mother's skirt, it shows that she feels like her mother will protect her from strangers.