To communicate that an action has occurred in the past, the location of the sign would be in front of the shoulder and the movement would be (answer) backward, over the shoulder

Latin question ! translate the sentence: multa aedificia romana tanta erant ut architecti ea diu aedificarent. a. many roman buildings were so great that the architects were building them for a long time. b. many roman buildings were so big that the architects used a lot of time to build them. c. many roman buildings were so great that architects d. many roman architects built such big buildings that they took a long time to build.