Answer:
The correct option is D: the positive utility Laura received from seeing her portfolio value rise was less than the disutility she felt when its value declined.
Step-by-step explanation:
Behavioral economics suggests that the pain felt when you lose $1000 is more than the joy you experience when you gain $1000 say in a lottery or any exercise without having to do any work from it. Thus this implies that positive utility is less than disutility in the case of Laura as depicted in the example.