Orthodontic Forces Applied to a Tooth Must Be Light and Maintained

Orthodontic forces applied to a tooth must be light and maintained in order to do which of the following?

A) Hyalinize the bone on the pressure side of the tooth,enabling optimal tooth movement.
B) Produce undermining resorption on the pressure side of the tooth,enabling optimal tooth movement.
C) Produce frontal resorption on the pressure side of the tooth,enabling optimal tooth movement.
D) None of the above;orthodontic forces applied to a tooth must be heavy and maintained to produce optimal tooth movement.