Which of the following would be considered an act of deregulation? 
a. Granger law − Established maximum rates, prohibited discrimination, and forbade mergers for railroads. 
b. Reed Bullwinkle act − legalized rate bureaus or conferences 
c. Trucking Industry Regulatory Reform Act − Motor carriers freed from filing rates with the Interstate Commerce Commission 
d. Freight Forwarders Act − Allowed Interstate Commerce Commission control over freight forwarders; controlled entry, rates, and services.