Which milestone describes the cabling extent on the second floor?

• A. 32,000 fiber lines installed, NBCU's record for the largest fiber patching system in the industry
• B. 350 miles of cables on the second floor
• C. Original steel trusses uncovered for the first time since 1930
• D. First ever circular assignment desk and media operations center at 30 Rock

Answer: (B)

The idea tested is how to express the scale of cabling work by the total length of cable laid on a specific area. The milestone that describes the cabling extent on the second floor is the statement that 350 miles of cables were installed on that floor. This directly communicates the magnitude and location of the cabling effort, making it the clearest and most relevant descriptor of how extensive the cabling work is on the second floor.

The other options focus on different aspects: one mentions a large fiber patching system, which is about fiber infrastructure but not specifically the second-floor cabling extent; the remaining choices refer to structural elements or a different facility feature altogether, not to cabling scope on that floor.