To answer this question, the user needs to have knowledge about the available project types in the New Project dialog box of a specific development environment.

The New Project dialog box is commonly available in integrated development environments (IDEs) like Microsoft Visual Studio, and it allows developers to create new projects in the language of their choice.

Now, let's go through each option and explain why it is right or wrong:

A. Visual Basic Projects: This option is partially correct. Developers can choose Visual Basic projects from the New Project dialog box if they are using Visual Studio. However, there are other project types available as well.

B. Visual C# Projects: This option is also partially correct. Developers can choose Visual C# projects from the New Project dialog box if they are using Visual Studio. However, like option A, there are other project types available as well.

C. Visual C++ Projects: This option is also partially correct. Developers can choose Visual C++ projects from the New Project dialog box if they are using Visual Studio. However, like options A and B, there are other project types available as well.

D. Both a and b: This option is incorrect because it only includes Visual Basic and Visual C# projects, leaving out the option of choosing Visual C++ projects.

E. All of the above: This option is correct because it includes all three project types - Visual Basic, Visual C#, and Visual C++ - that can be chosen from the New Project dialog box in Visual Studio.

Therefore, the correct answer is: E. All of the above.