The correct answer is B. Time calculation. In Workday Time Tracking, daily and weekly totals on a worker's time entry calendar are driven through the Time Calculation framework. Time calculations are used to evaluate entered time and produce results such as totals, overtime, premiums, exceptions, and other rule-based outcomes. When Workday needs to total time across a day or across a week, that logic is configured in a time calculation because calculations define how time is interpreted, accumulated, and processed.

The other options do not control this type of totaling behavior. A time calculation tag is mainly used to organize or identify calculations, not to perform the actual totaling logic. A time entry code identifies the type of time being entered, such as regular hours, training, or on-call time, but it does not define calendar total behavior. A time entry template helps control the layout or default structure for time entry, but it is not where daily or weekly total rules are configured.

So, if the question asks specifically where Workday configures the totals shown for a worker's calendar, the best and correct choice is Time calculation.