The correct answer is: B. Unaccountable.
Explanation:
- Confusing: something that is difficult to understand or interpret.
- Unaccountable: not able to be explained or justified.
- Chaotic: lacking order or organization.
- Unconnected: not joined or linked together.
In the context of the question, “inexplicable” means something that cannot be explained or justified. This is most closely aligned with the definition of “unaccountable.” Something that is unaccountable is not able to be explained or justified, and it is therefore difficult to understand or interpret.
The other options are not as closely aligned with the meaning of “inexplicable.” Something that is confusing may be difficult to understand, but it is not necessarily impossible to explain or justify. Something that is chaotic may lack order or organization, but it is not necessarily impossible to understand or explain. Something that is unconnected may not be joined or linked together, but it is not necessarily impossible to understand or explain.
Therefore, the correct answer is: B. Unaccountable.