Identify which one of the following statement is NOT correct?

• A. Preventing maintenance includes lubrication, cleaning, periodic overhaul, etc.
• B. The two types of cost-cost of premature replacement and cost of breakdownneed to be balanced.
• C. Wear and obsolescence are the two main causes of replacement of machinery in every aspect of life.
• D. A machine is technically obsolete when another machine can do the same job more efficiently with reduced time and also at a lower cost.