You plan to create a parallel application by using Microsoft Visual C++. You want to use the Microsoft Message Passing Interface (MPI) library in the application. You need to ensure that the application can be compiled for both 32-bit and 64-bit platforms. You also need to ensure that targeting both platforms requires minimum maintenance.
What should you do?

A.
Create a separate project for each platform.

B.
Create separate solution files for each platform.

C.
Create separate custom build rules for each platform.

D.
Create a separate build configuration for each platform.