A.xsl:iftest=\/\/stsuuser:AttributeList\/stsuuser:Attribute[attr=‘homepage‘]
B.xsl:iftest=\/\/stsuuser:AttributeList\/stsuuser:Attribute[@name=‘homepage‘]
C.xsl:if-exists=\/\/stsuuser:AttributeList\/stsuuser:Attribute\/custom:Homepage
D.xsl:if-exists=\/\/stsuuser:AttributeList\/stsuuser:Attribute[@name=‘homepage‘])
参考答案：B
