According to the Postal Reorganization Act of 1970, any unsolicited merchandise sent by mail is free to be used at the recipient's discretion, _____.

Multiple Choice

unless the Inspector General of the United States Postal Service (U.S.P.S.) requires the merchandise to be returned

unless the merchandise has a value of over $1,000

but she must pay the shipping expenses

with no obligation owed by the recipient to the sender

unless the merchandise has a value of over $500