There are two possibilities --
1. Fillmore's sculptures chosen --> show contains bronze works
2. Clivestone's sculptures chosen --> show contains stainless steel sculptures
Either 1 happens or 2, but not both.
Moreover, look at #1 carefully. It states that the show WILL contain bronze works. We are not certain WHETHER show will contain stainless steel sculptures or not. We CANNOT rule out the possibility that the show might contain stainless steel sculptures. All that we know for certain is that the show will contain bronze works.
Similar reasoning can be applied to #2.
Option A - IncorrectSince either #1 or #2 HAS to happen, this option would be incorrect.
Option B - IncorrectWe cannot say this for certain. It is also entirely possible that Clivestone's sculptures were chosen. This does not preclude the possibility of having bronze sculptures at the show.
Also, note that point #1 talks about "bronze works", not "bronze sculptures".
Option C - Incorrect"the art show will most certainly not contain both types of sculptures" -- We cannot infer this. See the reasoning above.
Option D - Correct answerBecause it is also possible that if the show contains stainless steel sculptures, Fillmore's sculptures are selected.
Option E - Incorrect"neither bronze nor stainless steel sculptures" = "neither bronze
sculptures nor stainless steel sculptures"
This is possible if Fillmore's sculptures are selected. This means that there WILL definitely be bronze works at the show, not necessarily bronze sculptures.
"it is certain that neither Fillmore’s nor Clivestone’s sculptures were selected for the show" -- this directly contradicts the premise given in the argument.