People suffering from this disorder, because of their fear of rejection and criticism, are generally unwilling to enter into close relationships without some assurance of acceptance.

A) delusional disorder
B) illness anxiety disorder
C) avoidant personality disorder
D) bipolar disorder

The symptoms described in the statement are characteristic of individuals with avoidant personality disorder. People with this disorder have an intense fear of rejection and criticism, which can lead them to avoid social situations and relationships. They may be unwilling to enter into close relationships without some assurance of acceptance. Delusional disorder is characterized by false beliefs that are firmly held despite evidence to the contrary, while illness anxiety disorder involves excessive worry about having a serious illness. Bipolar disorder is a mood disorder characterized by episodes of mania and depression.