Which statement about provider-independent and provider-assigned address blocks is true?

A.
There is no difference.

B.
PI space is not globally routable and can be used as private addressing.

C.
PA space is globally routable and can be obtained from IANA by all organizations.

D.
PA space is assigned by the ISP and PI space is assigned by the regional registry. Both are
globally routable.

E.
PI and PA blocks are both assigned by the regional registry to all organizations.