You need to create a custom user interface for modifying the Web Part properties

You have a custom Web Part. You need to create a custom user interface for modifying the Web
Part properties. What should you do?

A.
Create a new Master Page. Implement the IControlBuilderAccessor interface.

B.
Create a new tool part for the custom Web Part.

C.
Modify the [ToolBox] attribute of the custom Web Part.

D.
Create a new Web Part. Implement the IControlBuilderAccessor interface.