Which of the Following Best Describes the Relationship Between ADHD

Which of the following best describes the relationship between ADHD and conduct problems?

A) There is a strong comorbidity between oppositional defiant disorder and ADHD, but almost no relationship between conduct disorder and ADHD.
B) The presence of ADHD in childhood makes it twice as likely for an individual to develop a conduct problem.
C) Longitudinal research indicates that ADHD is causally related to the emergence of conduct problems.
D) An ADHD diagnosis includes any conduct and behavioral issues that result, so these conditions cannot be comorbid.