Which of the following statements regarding Hep B vaccines is TRUE? 
 
A. Dose 1 and 2 should be given 2 months apart. 
B. Dose 3 should be given 3 months after the 2nd dose. 
C. Antibody response to hepatitis B surface antigen should be performed 1-2 months after the third vaccine dose. 
D. Booster dose should be given every 10 years.