In an ODI interface, can source tables be declared as not joined?

A.
No, by default, every added data store in the source declaration of an interface is joined
with an inner join.

B.
No, in ODI, it is mandatory that all the source data stores are joined directly or indirectly.

C.
Yes, it is possible to create an ODI procedure to declare joins for the source tables.

D.
Yes, ODI generates the code calculating a sample of the data, profiling it, and deciding
automatically if a join exists.