A．To deliver the mail from Boston on horseback to its destination.
B．To take charge of the mall for all the colonies in North America.
C．To introduce the use of stagecoaches to carry mail.
D．To deliver mail to the communities from railways by horse and wagon.

A．Special medicine for his illness.
B．A rest for a few days.
C．A treatment that might be effective.
D．An operation was necessary.