In vb variable name cannot be more than . . . . . . . . characters

The correct answer is: A. 255 characters.

A variable name in VB can be up to 255 characters long. It can include letters, numbers, and underscores. It cannot start with a number or underscore, and it cannot contain spaces.

Option B is incorrect because a variable name can be up to 255 characters long, not 300.

Option C is incorrect because a variable name can be up to 255 characters long, not 355.

Option D is incorrect because a variable name can be up to 255 characters long, not 4000.