The correct option is A True
The given statement, "Carbon-14 dating is used to determine the age of once living material." is true.
Carbon-14 dating, also called radiocarbon dating, method of age determination that depends upon the decay to nitrogen of radiocarbon (carbon-14). Carbon-14 is continually formed in nature by the interaction of neutrons with nitrogen-14 in the earth,s atmosphere; the neutrons required for this reaction are produced by cosmic rays interacting with the atmosphere.