19 Choose the best answer with respect to the doctrine of exhaustion under the Patent Act:
(A) Only initial authorized sale of a patented item within Taiwan “exhausts” all rights of the patenteeto that item under the Patent Act.
(B) The patent holder is barred from enforcing the patent rights by operation of the doctrine ofexhaustion.
(C) The doctrine of patent exhaustion as applied in Taiwan includes only domestic exhaustion.
(D) The first sale doctrine is different from the doctrine of exhaustion.