LATIN QUESTION HELP PLEASEEE!!!

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.