Which of the following best describes the condition of roads in the late 1700s?
a. They had steadily improved from Roman times through the Middle Ages to the late 1700s.
b. They were muddy and rutted, inflicting on coach travelers bone-jarring injuries.
c. They were in a bad state but it mattered little because no one used them.
d. They had never been in better condition and spurred trade between cities and countries.