Single-wall metal pipe shall extend at least _________ above the highest point where it passes through a roof of a building and at least ___________ higher than any portion of a building within a horizontal distance of __________.
a) 1 foot, 6 feet, 10 feet
b) 2 feet, 4 feet, 5 feet
c) 3 feet, 2 feet, 8 feet
d) 4 feet, 3 feet, 12 feet