Final answer:
Individuals with paranoid personality disorder commonly employ denial, projection, and sometimes rationalization as defense mechanisms, though reaction formation and introjection are not typically associated as primary mechanisms for this disorder. Option A,C are correct.
Step-by-step explanation:
The defense mechanisms often used by individuals with paranoid personality disorder include denial, projection, and sometimes rationalization.
Denial is a defense mechanism in which a person refuses to accept reality or facts. They might refuse to recognize an event or thoughts that are obvious to others.
On the other hand, projection involves attributing one's undesirable feelings, thoughts, or impulses onto another person who does not have those feelings, thoughts, or impulses. Rationalization is a defense mechanism that involves explaining an unacceptable behavior or feeling in a logical or rational manner, avoiding the true reasons for the behavior.
Reaction formation and introjection are not typically associated with paranoid personality disorder as primary defense mechanisms.