Government Has a Variety of Policies That Allow Inventors to _______

Government has a variety of policies that allow inventors to _______, such as the granting patents and _______.

A) receive an increased rate of return; subsidization of research and development
B) protect their inventions; limited copyrights during the inventor's lifetime
C) register their inventions; unlimited copyrights during the inventor's lifetime
D) receive a reasonable rate of return; lifetime intellectual property rights.