(A) like human fingerprints, are a lifelong means of identification, since they are both unique and unchanging
(B) like human fingerprints, is a lifelong means of identification, since it is both unique and unchanging
(C) like human fingerprints, is a means of identification for life, being both unique and unchanging
(D) since they are both unique and unchanging, are, like human fingerprints, are a means of identification for life
(E) both unique and unchanging, are, like human fingerprints, a lifelong means of identification
Solution:
Subject-verb Agreement
In A, D, and E, subject-verb agreement is violated because for a singular noun (pattern) a plural verb (are) is used.
In C, usage of being makes the sentence passive unnecessarily. Furthermore, being both unique and unchanging is incorrectly modifying life.
In B, subject-verb agreement is maintained and hence, B is the best choice.
Sentence Correction - 1000 Questions with Solution: