You should exclude from a Historic Data Collection any indicator whose score is inherently dependent on the current date and time, as its scores cannot be accurately back-collected or recreated historically. Among the options provided:
D. Summed age of open problems
This indicator would be difficult to collect historically with accuracy because it depends on the current date relative to the open date of the problems, which would constantly be changing. Historic data collection would not be able to recreate past 'summed ages' accurately.
B. Number of open problems not updated in last 90 days
Tested in my PDI, this is the only indicator that das not have a Historical Job associated with it
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