Numeric reduction operation for timedelta64[ns] will return . . . . . . . . objects.

The correct answer is: C. Timedelta

A timedelta64[ns] is a numeric type that represents a time interval. It is a floating-point number with a unit of nanoseconds. Numeric reduction operations, such as sum, mean, and max, can be performed on timedelta64[ns] objects. The result of a numeric reduction operation on a timedelta64[ns] object is another timedelta64[ns] object.

A timeseries is a sequence of data points that are ordered by time. A timeplus is a function that takes two timedelta64[ns] objects and returns a new timedelta64[ns] object that represents the sum of the two input timedelta64[ns] objects. None of the mentioned options are correct.