Exam 300-425 topic 1 question 11 discussion

I'm logged into Prime 3.8 now, I selected one of our buildings, then a floor, then clicked "Inspect Voice Readiness" from the tools menu. With ''Cisco Phone' selected as client, the range is *not* editable, an it's -75dBm to -67dBm. So there is something wrong with this question and it's answers. No answer is right, and I've done a document search to try shed light on the correct answer and found nothing. Think very carefully about how you answer this!

there is something wrong with this question, by the way the right answer should be B

Always -67 is preferred

Can confirm that Cisco Prime 3.10 has static value -75 to -67 so -72 could be consider as preferred value.

You will see different values for this signal level. Some references will refer to −75 dBm, and they mean the minimum signal (signal should be at least at −75 dBm). Others will mention −72 dBm as the “preferred” minimum, meaning that −75 dBm is acceptable, but −72 dBm will provide a better location estimation.

-85 to -67 dBm (I guess the minus signs have forgotten in the answers)