The Illusionist, a novel by Irish author Jennifer Johnston,

The Illusionist, a novel by Irish author Jennifer Johnston, had been first published in 1995 by Sinclair Stevenson and is considered to be one of her best works

A. a novel by Irish author Jennifer Johnston, had been first published in 1995 by Sinclair Stevenson and is considered to be one
B. is a novel by Irish author Jennifer Johnston, which was first published in 1995 by Sinclair Stevenson and is considered as one
C. a novel by Irish author Jennifer Johnston, was first published in 1995 by Sinclair Stevenson and is considered one
D. a novel by Jennifer Johnston, an Irish author, was first published in 1995 by Sinclair Stevenson and was considered as one
E. a novel by Irish author Jennifer Johnston, is first published in 1995 by Sinclair Stevenson and is considered to be one

probably the easiest of the lot.
considered does not need "to be" or "as"
eliminate A,B,D,E


C wins.

hey - there aren't any specific rules these words are just idiomatic (no rules they are wat they are!).
For instance the word Declare - the usage is Declare X,Y (no preposition of anything is required )
Example : nearly-2000-years-after-its-initial-construction-the-united-122439.html

In the above knowing the idom can be useful in eliminating at-least 2 options otherwise there are also other errors in the sentence that can help kill options
Another example ->
Appoint X, Y
She was appointed the President (Not -> She was appointed as The President or She was appointed to be president )

Moreover GMAT stopped testing these sort of Idiom usages so I wouldn't bother much but I would note all Idiom tested in OG13/12 in case they appear again.

HTH!

This can be solved using Verb and meaning

A - Had been is absolutely not needed and is in fact wrong
B - Which refers to Jennifer, which is wrong
C - Correct Answer
D - Irish Author is wrongly referrring to whole clause preceeding it, which is wrong
E - IS is wrong verb here, because it should refer to past,as clearly mentioned by time 1995, it should not be simple present

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Hey this looks cool. New concept for me. Guys please elaborate. What are the rules and what are all the words that follow them.

This is a pretty easy one.
The noun Illusionist is correctly modified by the phrase "a novel by author Jennifer Johnston". The use of past participle "had been" is unnecessary here because the sentence describes a single action in the past. The use of the idiom 'consider' is incorrect in the original sentence.

From the given options, only C corrects all of the above. The answer is C.

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