Which of the following illustrates a refractory period in men?

A) Sean is unable to have an ejaculation again immediately following ejaculation during intercourse.
B) Owen feels discomfort in his testes because he experiences intense sexual arousal without ejaculation.
C) Austin usually ejaculates before penetrating his partner or soon after penetration.
D) Caden is incapable of ejaculation during sex because he is diabetic.

A refractory period is the time period after ejaculation during which a man is unable to achieve another erection or ejaculation. Option A describes this phenomenon, as Sean is unable to have another ejaculation immediately following the first one. Option B describes a different issue (testicular discomfort) and option C describes premature ejaculation, not a refractory period. Option D describes a medical condition (diabetes) that may affect sexual function, but not specifically the refractory period.