Which of the following statements is true about the difference between self-deceptions and delusions?

A) Delusions are possible, whereas self-deceptions often are not.
B) People harboring delusions think about their beliefs occasionally, but people with self-deceptions are constantly preoccupied with their beliefs.
C) People harboring self-deceptions attempt to convince others of these beliefs, but delusional people do no such thing.
D) People harboring self-deceptions typically acknowledge that their beliefs may be wrong, but delusional people often are resistant to arguments that contradict their delusions.