Which of the followinThe IS-LM can be viewed as a special case of the AS-AD model where: a. the short run aggregate supply curve is flat
b. the short run aggregate supply curve does not exist
c. there is only a short run aggregate supply curve if shocks are unexpected
d. the short run aggregate supply curve is verticalg statements is true

Pam is a low-risk careful driver and fran is a high-risk aggressive driver. to reveal their driver types, an auto-insurance company a. refuses to insure high-risk drivers b. charges a higher premium to owners of newer cars than to owners of older cars c. offers policies that enable drivers to reveal their private information d. uses a pooling equilibrium e. requires drivers to categorize themselves as high-risk or low-risk on the application form