Because the enemy’s new ship is the quietest and it is therefore the most elusive submarine, it is being increasingly viewed by the military as a threat to security.


and it is therefore the most elusive submarine, it is being increasingly viewed

it is therefore the most elusive of submarines, and it has increased the view

and therefore the most elusive submarine, it is increasingly viewed

and therefore it is the most elusive of submarines, there is an increasing view

therefore being the most elusive of submarines, it is increasingly viewed

OA- C

I do not understand, doesn't C change the meaning. Are we talking about a ship which s quiet and so cannot be detected by a submarine or we are talking about a ship which is a submarine

My approach to this is that:

A & E - eliminated due to 'being'. GMAT hates 'being' as far as i know.
B & D - eliminated because there is no comma after 'quietest'. You need a conjunction, exp AND, to link the sentence together. Other it just sound like a runaway train.

That's my elimination process.

Sorry. Edited my post.

sorry?

(a) and (c) both use exactly the same phrase, "the most elusive submarine". it is thus unmistakable that the ship in question is a submarine.
where do you perceive a distinction?

--

other points:

* yes, "being" here is bad.

* you can't just say "the enemy's new ship is the quietest"; superlatives such as "the quietest" must be paired with something, whether a noun (the quietest submarine) or a prepositional phrase (the quietest of all modern submarines). thus, you NEED a parallel structure, so that you're actually saying "the quietest submarine" (or "the quietest of submarines", although that's wordy).
(c) satisfies this criterion: "the quietest" is parallel to "the most elusive".
in (a) and (d), "and" is followed by a completely new independent clause. that's not a parallel structure, so we're left with "the quietest" in isolation. not good.

* (b) is awkward in general, but "it has increased the view" makes no sense at all. (sounds as though the ship is cranking up some dial)

* in (d), "there is an increasing view by the military" is unidiomatic.