The auto industry has been perfecting the internal combustion engine $($ICE$)$ for over $120$ years. However, the Partnership for a New Generation of Vehicles $($PNGV$),$ a cooperative program between the Big Three and the U$.$S$.$ government is currently attempting to replace ICES with electric engines. If the electric engine catches on with the public in effect supplanting the ICE, it will become an example of

a dominant design

design dichotomy

a synergistic design

a differential design