One May Say of Roman Slavery That

One may say of Roman slavery that

A) urban slaves with skills might hope for manumission.
B) freed slaves were barred from citizenship.
C) the number of slaves started to increase during the time of Augustus and thereafter.
D) although slaves might be freed, they and their children continued to suffer the loss of civic rights.
E) all mistreatment of slaves ended during the Pax Romana.