Hannah Used to Experience Insomnia Once or Twice a Week

Multiple Choice

Hannah used to experience insomnia once or twice a week.A month ago she starting taking Seconal to help her sleep,but now she finds she cannot get to sleep unless she takes a Seconal tablet.This would suggest that Hannah has

A) developed a drug tolerance for Seconal.
B) developed a dependency on Seconal.
C) habituated to the effects of Seconal.
D) developed pseudoinsomnia.