For a long-run gable roof, it is recommended that you start in the center rather than at one end or the other because _____.
a. this provides a slight slope from the center to help drain excess water from the roof
b. there is less chance of misalignment in both directions
c. composition shingles must be overlapped from side to side, starting from a center shingle
d. you cannot accurately measure the space between courses on the ends of the roof
Answer: B
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