Unlike the Battle of Midway, which historians regard as a pivotal mome

Unlike the Battle of Midway, which historians regard as a pivotal moment in World War II, historians regard the Battle of Debrecen as of marginal importance in determining the final outcome of World War II.

Only B, D and E are left as unlike is used to compare two nouns. Among them B is correct. Both D and E have incorrect idiom issue.

(A) historians regard the Battle of Debrecen as of marginal importance
(B) the Battle of Debrecen is regarded as relatively unimportant
(C) historians regard the Battle of Debrecen as of being marginal importance
(D) the Battle of Debrecen is regarded as being of relatively minimal importance
(E) the Battle of Debrecen is regarded by historians as being relatively unimportant

IMO Answer B.

The right answer is B.

Meaning: Unlike the Battle of Midway the Battle of Debrecen is regarded as relatively unimportant.
The opening modify suggests a comparison. So we need something that can be compared to the Battle of Midway. Since historians cannot be unlike the Battle of Midway, we can eliminate options A and C.

The use of of being in D and E is not right. regarded as relatively unimportant as in option B is more concise than regarded as being of relatively minimum importance in D and regarded as being relatively unimportant. Eliminate D and E and we are left with B as the best answer.

Unlike the Battle of Midway, which historians regard as a pivotal moment in World War II, historians regard the Battle of Debrecen as of marginal importance in determining the final outcome of World War II.

(A) historians regard the Battle of Debrecen as of marginal importance
(B) the Battle of Debrecen is regarded as relatively unimportant
(C) historians regard the Battle of Debrecen as of being marginal importance
(D) the Battle of Debrecen is regarded as being of relatively minimal importance
(E) the Battle of Debrecen is regarded by historians as being relatively unimportant

Answer is B for using correct comparison and for dropping the unnecessary 'being' as in D and E.

IMO B
the Battle of Debrecen is regarded as relatively unimportant

comparison ;; unlike X... Y..

Unlike the Battle of Midway, which historians regard as a pivotal moment in World War II, [url]historians regard the Battle of Debrecen as of marginal importance[/url] in determining the final outcome of World War II.

(A) historians regard the Battle of Debrecen as of marginal importance
(B) the Battle of Debrecen is regarded as relatively unimportant
(C) historians regard the Battle of Debrecen as of being marginal importance
(D) the Battle of Debrecen is regarded as being of relatively minimal importance
(E) the Battle of Debrecen is regarded by historians as being relatively unimportant

Comparison is between apples to apples: Battle to Battle.

Idiom: Regarded…as

Ans (B)

OFFICIAL EXPLANATION

There are two major problems with this sentence.

(1) A comparison should evaluate two parallel elements. The intention of this sentence is to contrast two World War II battles. However, the original sentence contrasts the Battle of Midway with historians regard the.... The correct contrast should involve two parallel elements: the Battle of Midway and the Battle of Debrecen.

(2) as of marginal importance can be written in a more concise manner (as marginally important). Further, the reference to historians can be omitted as it is clearly understood in the context.

A. A battle (Midway) is incorrectly contrasted with historians regard for a battle; as of marginal importance is wordy

B. The sentence correctly contrasts the two battles; the wordy phrase as of marginal importance is replaced by the concise phrase marginally important

C. A battle (Midway) is incorrectly contrasted with historians regard for a battle; as of being marginal importance is awkward, wordy, and grammatically incorrect

D. The wordy phrase regarded as being of relatively minimal importance should be replaced by the more concise phrase regarded as relatively unimportant

E. The wordy phrase regarded by historians as being relatively unimportant should be replaced by the more concise phrase regarded as relatively unimportant; the phrase by historians is clearly understood in the context of the sentence and does not need to be repeated