If inflation expectations rise, how do the short-run Phillips curve and unemployment change?
a. The short-run Phillips curve shifts right, so that at any inflation rate unemployment is higher.
b. The short-run Phillips curve shifts left, so that at any inflation rate unemployment is higher.
c. The short-run Phillips curve shifts right, so that at any inflation rate unemployment is lower.
d. The short-run Phillips curve shifts left, so that at any inflation rate unemployment is lower.