When many Scrum Teams are working on the same product, should all of their Increments be integrated every Sprint?

When many Scrum Teams are working on the same product, should all of their Increments be integrated every Sprint?
A . No, each Scrum Team stands alone.
B . Yes, but only for Scrum Teams whose work has dependencies.
C . Yes, otherwise the Product Owners (and stakeholders) may not be able to accurately inspect what is done.
D . No, that is far too hard and must be done in a hardening Sprint

Answer: C