Which Statement Is False Concerning a Natta-Ziegler Catalyst

Multiple Choice

Which statement is false concerning a Natta-Ziegler catalyst

A) A Natta-Ziegler catalyst can be used to promote a polymerization that is selective for isotactic or syndiotactic polymer.
B) A Natta-Ziegler catalyst containing [Al(C₂H₅) ₃] and TiCl₃ can be used to promote the formation of specific isomers in a polymerization.
C) A Natta-Ziegler catalyst is used to make a polymerization thermodynamically favorable.
D) A Natta-Ziegler catalyst has been used by chemists to design polymers with different properties.