To answer this question, you need to understand the concept of XAP.
Option A) Extended Application Language - This option is incorrect because XAP does not stand for Extended Application Language.
Option B) Silverlight Application Package - This option is correct. XAP stands for Silverlight Application Package. In Microsoft Silverlight, XAP files are used to package and distribute applications.
Option C) Extended Application Program - This option is incorrect because XAP does not stand for Extended Application Program.
Option D) None - This option is incorrect because XAP does have a meaning, which is Silverlight Application Package.
The correct answer is B) Silverlight Application Package.