Ursa Major Solar has a custom object, ServiceJob＿c, with an optional Lookup field to Account called Partner_Service_Provider＿c. The TotalJobs＿c field on Account tracks the total number of ServiceJob＿c records to which a partner service provider Account is related. What should be done to ensure that the TotalJobs＿c field is kept up to date?

A. Create an Apex trigger on ServiceJob＿c.
B. Change TotalJobs＿c to a roll-up summary field.
C. Implement a workflow cross-object field update.
D. Build a Process Builder with an invocable action.

Suggest answer: B

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