Critical Reasoning

Most land-dwelling vertebrates have rotating limbs terminating in digits, a characteristic useful for land movement. Biologists who assume that this characteristic evolved only after animals abandoned aquatic environments must consider the Acanthostega, a newly discovered ancestor of all land vertebrates. It possessed rotating limbs terminating in digits, but its skeleton was too feeble for land movement. It also breathed using only internal gills, indicating that it and its predecessors were exclusively aquatic. The statements above, if true, most strongly support which one of the following?
A. Many anatomical characteristics common to most land animals represent a disadvantage for survival underwater.
B. None of the anatomical characteristics common to most aquatic animals represent an advantage for survival on
land.
C. Acanthostega originated as a land-dwelling species; but evolved gills only after moving to an underwater
environment.
D. All anatomical characteristics not useful for land movement but common to most land animals represent an
advantage for survival underwater.
E. Certain anatomical characteristics common to some aquatic animals represent an advantage for survival on land.

Please can someone explain their logic of elimination and how they arrive at the right answer. Will give out the OA shortly

IMO E
B and D are too strong. (None and All...)
C) it is mentioned that Acanthostega and its predecessors were aquatic
A) Disadvantage is nowhere mentioned.

The stimulus is difficult but the choices are not.
A,B,D ->rejected because they are too strong to conclude from the given data
Between C and E,
C talks about the origination of Acanthostega which is not talked about in the passage.hence rejected.
Hence OA:E.

Please post the OA.
Thanks.

OA is E

imo E.

Got it, E it is!

A - Most and Many are not the same. Nor can we infer whether the anatomical features of land based animals represent a disadvantage underwater
B- No information given in the passage to arrive at this conclusion
C- This is the opposite of what is said about this creature in the argument
D- No information to draw this conclusion
E- This refers to the rotating limbs that are a useful characteristic for land movement

its a clean E,rest all options are either too strong or making an assumption.