BTGmoderatorDC wrote:Ezra Pound, considered by some to be one of the foremost poets of the 20th century, was the editor who did most of the editing work on T.S Eliot's Waste Land, a little known fact.

A. Ezra Pound, considered by some to be one of the foremost poets of the 20th century, was the editor who did most of the editing work on T.S Eliot's Waste Land, a little known fact.

B. Ezra Pound, considered one of the foremost poets of the 20th century, was the primary editor of T.S Eliot's Waste Land, a fact not well known by many.

C. It is little known fact that Ezra Pound, considered one of the foremost poets of the 20th century, was the primary editor of T.S Eliot's Waste Land

D. It is little known that poet Ezra Pound, considered as one of the foremost poets of the 20th century, edited the majority of T.S Eliot's Waste Land.

E. Ezra Pound, one of the 20th century's foremost poets, did most of the editing work for T.S Eliot's Waste Land, this is a little known fact.

The sentence contains a number of phrases that are separated from the rest of the sentence by commas, so look for modifier errors.

The phrase "a little known fact", which follows the sentence's final comma, is an appositive phrase (also called a noun phrase).
An appositive phrase describes the noun immediately next to it in the sentence.
Thus, the original sentence states that T.S. Eliot's Waste Land is a little known fact.

The sentence intends to state that Pound's editing of Waste Land is a little known fact, not that Waste Land is a little known fact.
Eliminate choice A and look for obvious repeaters. Choice B makes a similar error, so eliminate choice B.

Now, check the remaining answers for new errors.
Choice D introduces an idiom error. The word "considered" should not be followed by the preposition "as".
"I considered her a friend" is correct, but "considered her as a friend" and "considered her to be a friend" are incorrect.
Eliminate choice D.

Choice E lacks a coordinating conjunction, which is required to join the independent clause "this is a little known fact" to the rest of the sentence.
Eliminate choice E.

The correct answer is choice C.