Question

21. The frequency of preventive and predictive maintenance, testing, surveillance and inspection of individual
structures, systems, and components is determined by(more correct answers): a) Their relative
importance to safety, b) Number of maintenance perso
(A) a), b), c).
(B) a), b), d).
(C) a), d), e).
(D) b), d), e)
correct option please give me​

Answer 1

Answer:

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Explanation:

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