In Order to Determine If a Patient Has a Thyroid

In order to determine if a patient has a thyroid tumor,which diagnostic procedure could be performed?

A) Patient drinks low levels of radioactive Iodine-131,then has an X-ray.
B)
Patient drinks high levels of radioactive Iodine-131,then has a PET scan.
C) Injection of low levels of radioactive glucose,then patient has a PET scan.
D) Injection of low levels of radioactive Thallium-201,then patient has a PET sca.n
E) Injection of high levels of radioactive glucose,then patient has an X-ray.