Answer:
1. Decide the case based on the above stated facts.
Corporations provide limited liability to their owners, and one person corporations are legal in all states. Depending on how Arthur handled his business, the corporate veil might or not be lifted. If he separated the corporate account and managed the corporation separately for his other assets, then he is not liable.
On the other hand, if he paid the bills using his personal account, or used the corporation's assets as his own, then the outcome might change. We are not given enough details.
2. Assuming Arthur Jensen could be held personally liable, how could Arthur Jensen have better protected himself?
Simple, he should sign as the president of the corporation and pay using the corporation's account.