The delivery of first-class mail by the u. s. postal service is an example of:
a. perfect competition because consumers have access to other methods of written communication; for example, email and text messaging.
b. monopolistic competition, because mail delivery is a differentiated product provided by many firms.
c. a monopoly.
d. an oligopoly because a few other firms provide delivery of letters and packages."

The map shows latitudes and longitudes of france. which city is located at approximately 48°n, 7°e?

Aresearcher is studying women recently admitted to a state prison. all potential subjects must have children under the age of five. research subjects will be given a basket of toys to use at their children’s first visit that the children can then take home. in assessing this proposal, the irb needs to determine that the toys are: age appropriate.not an excessive incentive.educational.of high quality.

Read the aphorisms. be slow in choosing a friend, slower in changing. an open foe may prove a curse; but a pretended friend is worse. a true friend is the best possession. according to these aphorisms from benjamin franklin's poor richard's almanack, what might happen if a person is careless in choosing a friend? it is best not to have friends because they will usually betray you. casual friends are often the best and can be more trusted than enemies. a person who has betrayed you can sometimes become a good friend. a friend who is not carefully chosen can be worse than an enemy.