What should you create?

You are designing Windows Presentation Foundation (WPF) applications by using Microsoft
.NET Framework 4. You need to maintain a common appearance and behavior across all
applications in your company. You also need to ensure that the look and feel of the
applications can be modified without recompiling them. What should you create?

A.
an instance of the System.Windows.Media.StyleSimulations class

B.
user controls in a shared assembly