Regarding erectile problems, which of the following statements is/are TRUE?

Question

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A) If a man can have an erection at other times, such as during sleep, the problem probably is not physical. This is true because if a man is having spontaneous erections during sleep or in the morning, it suggests that the problem is not physical but might be psychological.
B) Erectile problems are also a normal part of aging. This statement is true because as men age, they may experience a decline in their sexual function due to physical changes in the body, medical conditions, or medication use.
C) Masters and Johnson believe that a problem exists when failure occurs on 25 percent or more of a man's lovemaking attempts. This statement is true because Masters and Johnson developed a criterion for sexual dysfunction that requires a person to have persistent or recurrent difficulty with sexual response or experiencing sexual pleasure. They defined male sexual dysfunction as the inability to achieve or maintain an erection at least 25% of the time during sexual activity.

Regarding Erectile Problems, Which of the Following Statements Is/are TRUE