Answer:
B) Hillward can sue Hobert since the logo has been used by Hillward and is associated with it.
Step-by-step explanation:
Since Hillwards logo is an elaborate piece of creative art, then they can sue Hobert for using their logo since it was associated directly to them during the past decade. Common logos are not usually protected by copyright unless they show significant creative artwork done.
It is always better and easier to protect a logo when it is a registered trademark but even if you haven't registered it you can still sue and win for infringement. When a company uses a logo, especially for a long time, it is establishing common law trademark rights.