Did Alan Act Properly in Hearing the Dispute

Did Alan act properly in hearing the dispute?

A) He acted properly because it is presumed that arbitrators are unbiased regardless of their relationship with a party.
B) He acted properly because he only had to reveal the information at issue if Lydia had directly asked about it.
C) He should have revealed that he was married to Jae's cousin, but none of the other information had to be revealed.
D) He should have revealed that he had received loans from Jae, but he had no obligation to reveal other information.
E) He should have revealed all the information and should have refused to arbitrate the case. His actions would be considered by a federal district judge and the award would likely be set aside because of a showing of bias.