Answer:
D) obsessive-compulsive disorder.
Step-by-step explanation:
Obsessive-compulsive disorder: In abnormal psychology, the term obsessive-compulsive disorder is also represented as OCD, and is defined as a mental disorder that hampers people of different age groups and often lasts through life. It occurs when an individual experiences various cycles of obsession and compulsions.
A person with OCD often experiences intrusive and unwanted thoughts, urges that lead to develop distressing feelings.
Types: Contamination and washing, doubts related to accidental harm, etc.
In the question above, Chelsea is suffering from obsessive-compulsive disorder.