Postal rates have seen a steady increase since inflation in the 1970s.
Answer: Option A
Step-by-step explanation:
They mail delivery was developed widely in the nation. Also, there was a problem with the US postal system since it's affected by bankruptcy. Also, the rates for posting a mail depended on the sender and receiver distance. The rates were also not stable until 1968 and the price was increased each year. That, in turn, increased its total revenue of the postal system.
Moreover, the priority (such as first-class mails) over the mails also increased the revenue. The post office evolved into US postal service along with logo and rates fixed by the Postal Regulatory Commission. Also, it drew the attention of Congress to oversight the postal service.