Economists have remained skeptical of the argument that the short-run Phillips curve is vertical for all of the following reasons except: A. workers and firms may not have rational expectations. B. workers and firms may have long term contracts. C. workers and firms may not be able to accurately use information from the Fed. D. workers and firms may adjust prices and wages quickly.

Secured loans are protected by collateral security. examples: title loans where the borrower uses the car title as collateral security interest rates are lower and repayments are longer therefore risk is low as a collateral security is given as guarantee to the bank in case of failure to pay the loanunsecured loans are not protected by collateral security but it is given on the creditworthiness of the borrower, trusting that she/he will pay on time. examples; payday loans is a short term loan where the borrower lends money from the bank and pays is back when the borrower receives his/her wages.interest rates are high and repayments are shorter. but the risk is high as no collateral security is given as a guarantee to the bank for payment of the loan