Jennifer, a Resident of North Carolina, Was Granted a Patent

Jennifer, a resident of North Carolina, was granted a patent for a device she invented. Donald, a resident of Texas, claims to have invented the device earlier, and disputes the patent granted to Jennifer. Which of the following should Donald do?

A) file a case in a North Carolina state trial court, as it has in personam jurisdiction over Jennifer
B) file a case in a Texas state trial court, as the long-arm statute grants it in rem jurisdiction over Jennifer
C) file a case in the Ninth Circuit Court of Appeals, as there is concurrent federal jurisdiction due to diversity of citizenship
D) file a case in a federal trial court, as federal courts have exclusive jurisdiction over this subject matter