Galton’s claim that fingerprints are unique is almost universally acce

Hi,
Here is my analysis.
I think option D is correct.
Why so?

Question : Galton’s claim that fingerprints are unique is almost universally accepted despite using less than one hundred samples for his initial investigation and statistical methods that are not entirely convincing.


A. Galton’s claim that fingerprints are unique is almost universally accepted despite using less than one hundred samples for his initial investigation and statistical methods that are not entirely convincing.
Missing punctuation such as comma between the sentence fragments.

B. Galton’s claim that fingerprints are unique is almost universally accepted despite his using statistical methods that are not entirely convincing and less than one hundred samples for his initial investigation.
Clear parallelism error. after "and" and before sentences are not parallel

C. Even though Galton used one hundred samples or less, for his initial investigation, and used statistical methods that are not entirely convincing, his claim for fingerprints that are unique is almost universally accepted.
"His claim of" is a wrong idiom

D. Even though Galton used less than one hundred samples for his initial investigation, and used statistical methods that are not entirely convincing, his claim that fingerprints are unique is almost universally accepted.
Everything fits well

E. Even though Galton used less than one hundred samples for his initial investigation, his claim that fingerprints are unique is almost universally accepted, despite the fact that he used statistical methods that are not entirely convincing.
less than one hundred samples and the facet about statistics methods should be together and not so far since, they both depict the same action and meaning

Hope this helps.
Apologies for typing real bad. It was my first post.