Morgan Neville, the filmmaker of both Won’t You Be My Neighbor, a historic work on the life of Mr. Rogers, and also of 20 Feet from Stardom, a look into the experience of background singers, is a knowledgeable authority on directing and producing documentaries
If i break the sentence in simple way then, it would be as per below sentence,
Morgan Nevile (MN) is a is a knowledgeable authority on directing and producing documentaries. MN, filmmaker of both X, (appositive/modifier of film X = a historic work on the life of Mr. Rogers), and also Y (appositive/modifier of film X = a look into the experience of background singers).
Here, parallelism is not maintained on both side of parallel connector, both X and Y, instead also is used, which is not preferred by GMAC. In addition, authority means knowledgeable. So, it's usage is redundant.
A.
also of 20 Feet from Stardom, a look into the experience of background singers, is a
knowledgeable authority on - Incorrect due to above reasons.
B.
also 20 Feet from Stardom, a look into the experience of background singers, is a
knowledgeable authority about - Incorrect due to same reasons of A. Additionally, incorrect idiom is used here, i.e. authority about.
C.
of 20 Feet from Stardom, a look into the experience of background singers, is an authority on - Violates the parallelism, both X and Y.
D.
of 20 Feet from Stardom, a look into the experience of background singers, is a
knowledgeable authority on - Violates the parallelism, both X and Y.
E. 20 Feet from Stardom, a look into the experience of background singers, is an authority on - Aha perfect sentence with no error.
Morgan Neville, [the filmmaker of both Won’t You Be My Neighbor, (a historic work on the life of Mr. Rogers,) and 20 Feet from Stardom, (a look into the experience of background singers),] is an authority on directing and producing documentaries.
Imo. E