What is the address of the Office of Contract Administration in San Francisco?

The address of the Office of Contract Administration is best represented by the choice that includes both the building designation and the specific room number. "City Hall, Room 430, 1 Dr. Carlton B. Goodlett Place" clearly identifies the Office located within City Hall and specifies that it is in Room 430, which is essential for finding the office. This level of detail helps ensure that individuals looking to contact or visit the office can do so without confusion.

Other options, while they provide parts of the address, either lack the detailed room number or misrepresent the structure of the address. The inclusion of both "City Hall" and "Room 430" makes the correct answer the most precise and accurate choice for those seeking information about the Office of Contract Administration's location.