Which method is used to detect rot in manila lines?（）<br>A:Feeling the surface of the line for broken fibers<br>B:Measuring the reduction in circumference of the line<br>C:Observing for the appearance of mildew on the outer surface<br>D:Opening the strands and examining the inner fibers

Which method is used to detect rot in manila lines?（）
A:Feeling the surface of the line for broken fibers
B:Measuring the reduction in circumference of the line
C:Observing for the appearance of mildew on the outer surface
D:Opening the strands and examining the inner fibers

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