Argument:
Premise: Automobiles are means of transportation.
Claim: Because automobiles are transportation devices, they are not art.
Conclusion: Therefore, automobiles should not be in the museum's art collection.
This argument rests on the idea that:
If something is designed primarily as a means of transportation (pragmatic use), it cannot be considered art.
What does this imply about the principle underlying the argument?
The argument assumes that art cannot have pragmatic utility or art must be free of practical function.
Now, let's evaluate the answer choices:
(A) The automobiles will not be used as transportation because they are in a museum, so they can be counted as art.
This challenges the argument's conclusion by saying that since cars aren’t used as transportation inside the museum, they could be art — the opposite of what the argument rests on.
So this does not underlie the argument; it goes against it.
(B) Many features of automobiles, like fins, serve no practical purpose and therefore cars can be counted as art.
Again, this supports the idea that cars can be art, opposing the argument's conclusion.
Not the principle the argument depends on.
(C) A true artist works without commercial concerns.
This is about artist motivation, unrelated to whether an object with utility can be art.
Not relevant.
(D) Art must be designed without pragmatic utility.
This fits perfectly with the argument's principle: since cars have pragmatic utility (transportation), they cannot be art.
This underlies the reasoning.
(E) The automobile industry has excessive costs because of focusing on design rather than cost and pragmatism.
Irrelevant to the question of the nature of art or whether automobiles can be art.
Hence, D is answer