What Was the Primary Reason Why Jacobs Advocated for Mixed

What was the primary reason why Jacobs advocated for mixed use development?

A) Built environments used for multiple purposes kept cities vibrant and interesting, incorporating primary and secondary uses.
B) Mixed use developments were cheaper to build because uses were not separated and separately constructed.
C) Jacobs wanted to limit mobility of residents to their own neighborhood, and so each neighborhood needed spaces for each kind of use.
D) Jacobs felt that if commercial spaces closed at dinner time, the city would be quieter when families spent time together.