During the war, the king and queen constantly visited factories and bo

[quote="Bunuel"]During the war, the king and queen constantly visited factories and bombed out civilians.

The sentence wants to say that king and queen visited factories and probably people who had been impacted by the bomb .
The non underlined sentence is in p=simple past tense .

A. bombed out civilians - it means that king and queen bombed out civillian . REJECT A
B. they bombed the civilians out - THEY means that king and queen bombed out civillians. REJECT B
C. civilians bombed out - doesn't make sense and doesn't sound meaningful REJECT
D. civilians who had bombed out - civilians bombed out something ..this dosent make sense .REJECT
E. civilians who had been bombed out - yes this makes sense . KING AND QUEEN VISITED THOSE CIVILIANS WHO HAD BEEN BOMBED OUT . we need past perfect because this event (of people who were bombed )happened before the visit of king and queen .

IMO E