The Today property of the DateTime structure returns the current date with the time component set to zero1. The Subtract method of the DateTime structure returns a new DateTime object that is the result of subtracting a specified time interval from this instance2. The TimeSpan structure represents a time interval that can be expressed in days, hours, minutes, seconds, and milliseconds3.
Option D is the correct way to subtract a specific TimeSpan from Today in VB.NET. For example, the following code snippet subtracts one day and two hours from the current date and displays the result:
Dim ts As New TimeSpan (1, 2, 0, 0) ' One day and two hours
Dim result As DateTime = Today.Subtract (ts) ' Subtract from Today
Console.WriteLine (result.ToString ("d")) ' Display the result
Option A is not valid, because there is no SubtractSpanFrom method in the DateTime structure. Option B is not correct, because it subtracts the TimeSpan from the current date and time, not just the date. Option C is not valid, because there is no SubtractUsingDate method in the DateTime structure.
[References: 1: DateTime.Today Property (System) 2: DateTime.Subtract Method (System) 3: TimeSpan Structure (System), , , ]
