Which of the Following Statements, If Any, Is False

Which of the following statements, if any, is false?

A) Monoclonal antibodies are made by identical immune cells and so will recognize and bind just one specific epitope on a target molecule.
B) Monoclonal antibodies of rodent origin are far from ideal therapeutic agents because of their short half-life in human serum and the potential for immune responses by the recipient.
C) Humanized antibodies are hybrid antibodies that have constant regions of human origin but variable regions of rodent origin.
D) An intrabody is an artificial constructs with just a single chain that is linked to variable domains and, unlike regular antibodies with four polypeptide chains, has the potential to work inside cells.