Which statement is NOT true about creating an assembly?

A.
The assembly document must be obtained as a virtual document.
B.
If follow_assembly is true, and there are virtual document descendant nodes that are also
assembly documents, each of those child documents of the sub-assemblyare added.
C.
All the virtual document binding rules are reapplied at the time theassemble() method is called.
D.
You need to use the virtual document reference to call theassemble() method.