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Q26 Single choice

A developer working on a time management application wants to make total hours for each timecard available to applications users. A timecard entry has a Master-Detail relationship to a timecard.

Which approach should the developer use to accomplish this declaratively?

A
A visualforce page that calculates the total number of hours for a timecard and displays it on the page.
B
An Apex trigger that uses an Aggregate Query to calculate the hours for a given timecard and stores it in a custom field.
C
A Roll-up Summary field on the Timecard Object that calculates the total hours from timecard entries for that timecard.
D
A Process Builder process that updates a field on the timecard entry is created.

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