Happy to help. The question is asking us to choose that answer that describes what the uncertainty mentioned in line 2 of the passage is referring to, so we need to look at the surrounding text around line 2.
We know that there's a bill that was designed to reduce the uncertainty inherent in the ownership of art by specifying certain conditions that must be met before an allegedly stolen work of art can be reclaimed by a plaintiff.
From the surrounding text, we know that the bill is trying to set standards so that an average Joe can't just claim that a museum stole a piece of art from him. This is the "uncertainty" that is being referred to in line 2 that the bill is designed to address.
(B) says that the uncertainty in line 2 is referring to "concern that owners of works of art often have that their possession of such objects may be legally challenged at any time." This is precisely the uncertainty that the bill is attempting to address in setting standards that must be met before someone can claim a stolen work of art from someone else, and it's exactly what we inferred by looking at the text surrounding line 2. This is our answer choice.
(E) is incorrect because while it may very well be a type of uncertainty that owners of works of art have, it is not the type of uncertainty that the word "uncertainty" refers to in line 2. (E) fails to mention how uncertainty functions in relation to the bill, which is what makes it incorrect. (B), on the other hand, describes the type of uncertainty that the bill is aimed at reducing, so it's the correct answer.
Does this make sense? Let us know if you have any more questions!
