A third-generation Japanese American woman flushes when she drinks alcohol. What might you ...

A third-generation Japanese American woman flushes when she drinks
  alcohol. What might you conclude?
 
  A. The flushing response indicates that she is an alcoholic.
  B. The flushing response indicates that she probably has a genetic
  sensitivity to alcohol.
  C. Based on statistics of substance disorders for third-generation
  women and on her flushing (genetic sensitivity to alcohol), she is
  at risk for alcoholism.
  D. She is probably not at risk for alcoholism despite her flushing,
  because being a third-generation American statistically shows
  low risk.