"matthew spends each morning counting every book in his personal library, as well as every kitchen utensil and dish before he will leave for work. he repeats the process when he comes home. he recognizes that this is irrational, but he becomes extremely agitated when he tries to stop. matthew's behaviors are most likely symptoms of"

Obsessive-Compulsive Disorder

Explanation:

Obsessive-Compulsive Disorder: In abnormal psychology, the term obsessive-compulsive disorder is also referred with OCD, and is described as a mental illness or mental health condition or disorder that encounters different people of various age groups and remains throughout the life.

An individual develops the obsessive-compulsive disorder when he or she gets to indulge in a cycle of obsessions (intrusive or unwanted thoughts that create distressing emotions) and compulsions (repetition of a particular behavior).

In the question above, Matthew's behaviors are most likely symptoms of obsessive-compulsive disorder.