Guys, here is the OA.
The original sentence contains several errors. First, the pronoun "their" logically refers to alpacas, yet alpacas are not mentioned in the sentence. Instead, we have "alpacas' fleece," i.e. we have alpacas' in the possessive form. Second, the singular verb "fetches" is paired with the plural noun phrase "five pounds of fleece." Third, the use of the semicolon here is improper. A semicolon is used to separate two closely related clauses (subject + verb). Here, however, what follows the semicolon is not a clause since it can not stand alone as a sentence. Lastly the word "while" is preferable to "even if" or "even though" for showing contrast.
(A) This choice is incorrect as it reapeats the original sentence.
(B) This choice does not remedy the pronoun issue, merely replacing "their" with "its". The "its" now seems to replace fleece, however, it is not the market value of the fleece to which the Alpacas' fleece is being compared. It does not remedy the subject-verb or semicolon problems, either.
(C) This choice does not remedy the pronoun issue, merely replacing "their" with "its". The "its" now seems to replace fleece, however, it is not the market value of the fleece to which the Alpacas' fleece is being compared. This choice does fix the semicolon issue by getting rid of it, however, the construction while... even though... makes no sense. The subject-verb issue (pounds fetch) has been corrected.
(D) CORRECT. The pronoun issue is solved by replacing the pronoun "the animal's." The semicolon correctly separates two independent clauses. The "while" correctly separates two contrasting ideas and the verb "fetch" agrees with "pounds."
(E) The comparison between "worth" and "value" is illogical, as is their description as "little." Nonetheless, the pronoun issue is remedied by replacing "their" with "the animal's". The semicolon is used correctly here (two clauses). The subject-verb agreement remains (pounds fetches) and the "while" construction from D is preferable to the "even though" to express the contrast in the second clause.
The correct answer is D.