Early Christian cemeteries were a network of chambers dug underground. Which of the following would best complete this statement?

a. These catacombs housed some of the earliest art dating from the time of Jesus.
b. These catacombs would run for miles and give us the earliest information about Christian life and rituals.
c. These catacombs were dug inside the cities walls so the Romans could keep a close eye on the Christians.
d. These catacombs were dug outside the city walls and funded by the Romans so they could keep control over the Christians.

Answer: b. These catacombs would run for miles and give us the earliest information about Christian life and rituals.