They worshipped in private homes and in catacombs most of the time. Some worshipped in other secretive places, but the majority stuck to those main two.
The answer is ; B) catacombs.
catacombs are underground cemetery that commonly exist in European empires.
Due to the persecution, the Christians in early Roman empire need to find a place that can avoid detection from the roman soldiers. Catacombs were seen as the best options since the roman soldiers rarely conducted patrol on this area
