For a building with 100,000 square feet or less of usable floor space, what would be the minimum size of the backboard in an entrance facility to accommodate up to 1,200 copper pairs, protected and terminated in a manner suitable for cross-connection requirements?
a) 48 inches by 24 inches
b) 36 inches by 18 inches
c) 72 inches by 36 inches
d) 96 inches by 48 inches