How many root causes of reactive maintenance problems are listed in the material?

• A. 5
• B. 3
• C. 4
• D. 6

Answer: (A)

The idea here is to match how many distinct root causes the material actually lists for reactive maintenance problems. The best choice is the one that reflects exactly that count as described in the material. To verify, locate the section that enumerates the root causes, read each item carefully, and ensure each entry is a true root cause (not just a symptom or a contributing factor) and that you’re not counting the same issue more than once. Once you’ve listed them all, the number you’ve counted should align with the option that mirrors the material’s enumeration. The other options would correspond to counts that either include something not listed or miss an item that is listed, causing a mismatch with what the material states.