How Often Should a Dental Hygienist Review the Applicable State

How often should a dental hygienist review the applicable State Dental Practice Act?

A) When first graduating from an accredited dental hygiene program.
B) When first applying for a license in the state where he or she intends to practice dental hygiene.
C) Once every 3 years.
D) On a yearly basis.
E) It is not necessary once a student has graduated from an accredited dental hygiene program.