The second is an economic argument which presumes that the Postal Service as a monopolist is an efficient provider of delivery.
Monopolistic service providers are sometimes assumed to operate efficiently.
The Postal Service does not operate as a monopoly.
A person in a black shirt running a marathon.
The team is rowing.
children on the way to school
Ca'daan's head was swimming.
A woman is walking outside.
It was necessary that it be confirmed or ruled out as a possibility.