Fran Uses Ecstasy Each Weekend with Her Friends at the Club.During

Fran uses ecstasy each weekend with her friends at the club.During the week,she craves the drug and spends most of her week planning how she will obtain and use the drug.During the early part of the week,she has difficulty getting back on track and recovering from her use over the weekend.She has missed work several times because of her drug use.Because she has been using the drug for an extended period of time,she needs more of the substance to obtain the desired effect.Which of the following best describes the severity of her substance use disorder?

A) mild
B) moderate
C) severe
D) extreme