You are creating a custom content type named CT1.
You need to use a Feature to add an existing site column named SiteCol1 to CT1.
Which code segment should you include in the Feature?
A. <Field ID="SiteCol1"/>
B. <Field ID="{XXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXX}" Name="SiteCol1"/>
C. <FieldRef ID="SiteCol1" Name="{XXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXX}"/>
D. <FieldRef ID="{XXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXX}" Name="SiteCol1"/>
