You write the following code segment to call a function from the Win32 Application Programming Interface （API） by using platform invoke.   string personName = "N？el"；  string msg = "Welcome " + personName + " to club ’’!"；  bool rc = User32API.MessageBox（0， msg， personName， 0）；  You need to define a method prototype that can best marshal the string data. Which code segment should you use？（）

• A、A
• B、B
• C、C
• D、D