Comprehensive and Detailed Explanation From Exact Extract (Nokia 7750 SR OS Routing Protocols Guide — OSPF ASBR Behavior & LSA Flooding):
Since there are no stub or NSSA areas, R1 (ASBR) generates Type 5 LSAs directly.
Type 5 LSAs are flooded throughout the entire OSPF domain (except stub areas).
Routers in Area 0, Area 1, and Area 2 — including R7 — will receive Type 5 LSAs.
A: Type 7 LSAs are only used in NSSA, which is not configured here — FALSE.
B: Type 5 LSAs are flooded domain-wide — FALSE.
C: No Type 7 LSAs involved — FALSE.
D: Correct.
Thus, correct answer: D.
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