Which of the following statements is not true（ ）。

A、The more mobile the lip, the less tooth that can be displayed with the lip at rest.
B、The less mobile the lip, the more tooth display at rest.
C、There is a general rule for achieving proportionate smile design that laterals should measure 2/3 of the centrals and canines 4/5 of the laterals.
D、An acceptable central incisor is 10.5-11mm in length, with lateral incisors 1-2.5mm shorter than the centrals, and canines 0.5-1mm longer than the centrals for an esthetic smile display.