Unearthed in China, fossils of feathered dinosaurs offer the most dramatic evidence yet discovered of the close evolutionary relationship between dinosaurs and birds.

A. offer the most dramatic evidence yet discovered of the close evolutionary
relationship between dinosaurs and birds
B. offer evidence more dramatic than what has yet been discovered of the close
evolutionary relationship between dinosaurs and birds
C. offer more dramatic evidence of the close evolutionary relationship than any yet
discovered between dinosaurs and birds
D. have offered the most dramatic evidence of the close evolutionary relationship
between dinosaurs and birds that have yet been discovered
E. have offered more dramatic evidence than any that has yet been discovered of the
close evolutionary relationship between dinosaurs and birds

Pls explain each choice to me, thank you so much~

See this link and search for "most dramatic"

http://www.timesonline.co.uk/tol/news/science/article5200977.ece

Let's discuss the options here -

IMO OA should be 'A'

A - offer the most dramatic evidence yet discovered of the close evolutionary relationship between dinosaurs and birds - correctly uses the superlative "most" and the sentence is grammatically correct.

B - offer evidence more dramatic than what has yet been discovered of the close evolutionary relationship between dinosaurs and birds -- incorrectly uses "more" we are comparing current evidence with all other evidences, should be most. Also more dramatic should come before the noun evidence.

C - offer more dramatic evidence of the close evolutionary relationship than any yet discovered between dinosaurs and birds -- Same as 'B'. Here "any yet discovered" can modify relationship as well. Ambiguous statement. Incorrent

D - have offered the most dramatic evidence of the close evolutionary relationship between dinosaurs and birds that have yet been discovered -- that clause incorrectly modifies birds. We dont mean to say "birds that have yet been discovered"

E - have offered more dramatic evidence than any that has yet been discovered of the close evolutionary relationship between dinosaurs and birds -- if that ( in italics ) is evidence then it would be incorrect to say -- than any evidence "has" yet been discovered. -- we dont need 'has' here, without 'that'.

Anyone please correct if I m wrong somewhere !

What is the original source of this question?

_________________
Jamie Nelson
ManhattanGMAT Instructor