If a Router originates a type 1 router LSA with the E bit set, what...

Comprehensive and Detailed Explanation From Exact Extract:

From Nokia 7750 SR OS Routing Protocols Guide (OSPF LSA Type 1 — Router LSAs):

The E-bit indicates that external LSAs (Type 5) are allowed in the area.

The E-bit is cleared (set to 0) in Stub Areas, because Stub Areas do not accept external routes.

In Standard Areas (Normal Areas) and Backbone Areas, the E-bit remains set.

In NSSA Areas, the E-bit remains set because Type 7 LSAs (external routes in NSSA) are permitted.

Thus, correct answers: A, C, D.

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